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Koleksiyondaki öğeler
- MakaleAçık Erişim2026Scopus SJRQ3Bicuspid Aortic Valve in Adult Patients: Accompanying Cardiovascular Pathology and Variations
Akturk, Yeliz; Durmus, Irfan; Kavak, Rasime Pelin; Ozdemir, Meltem
Introduction: This study aimed to investigate the prevalence of aortic valve calcification, aortic dilatation, and coronary artery disease (CAD) in patients with bicuspid aortic valve (BAV) identified incidentally through coronary computed tomography angiography (CCTA) and to compare epicardial adipose tissue (EAT) thickness between BAV and tricuspid aortic valve (TAV) patients. Materials and Methods: Thirty-five BAV patients aged 42-67 and 75 TAV patients aged 31-66 were included in the study. Aortic diameters were measured at the sinus of Valsalva, sinotubular junction, and ascending and descending aorta. Agatston calcium scores and CAD-Reporting and Data System were used to assess coronary artery calcification and atherosclerosis severity. EAT thickness was measured volumetrically, and its relationship with clinical and imaging parameters was evaluated. Results: In patients with BAV, the aortic diameters at the Valsalva sinus, sinotubular junction, and ascending aorta were larger compared to patients with TAV. The difference was statistically significant (P < 0.001). Aortic valve calcification was present in 45.7% of BAV patients, with an average Agatston score of 349.06 +/- 413.22, while no calcification was detected in TAV patients. Although no significant difference in EAT thickness or CAD prevalence was observed between BAV and TAV groups, EAT thickness was positively correlated with aortic dilatation, coronary artery calcification, and aortic valve calcification. Conclusions: BAV patients exhibit distinct vascular and valvular characteristics, with aortic dilatation and aortic valve calcification being prominent. EAT may serve as a marker for these complications. Further prospective studies are needed to elucidate the pathophysiology of BAV and optimize early intervention strategies.
- MakaleAçık Erişim2026Spotify Users' Platform Experiences in the Context of Mutual Domestication
Tokgöz, Cemile; Önal, Aleyna; Üzer, Benian
Both critical algorithm studies and recent scholarship centered on domestication theory emphasize the influence digital platforms have in shaping user behavior while also pointing to the importance of user agency. In their 2019 study, Siles et al. adapted domestication theory to digital platforms through their research on Netflix and developed the concept of mutual domestication. The domestication approach focuses on the shaping effect between everyday life, media technologies, and cultural elements. This study adapts the mutual domestication approach to Spotify as a cultural platform and examines the relationship between user agency and platforms' shaping effect by addressing it as a cyclical process. The study discusses the relationship between algorithm and culture, the transformation of the domestication approach through digital technologies, and the functional as well as algorithmic differences between Netflix, which was examined in the adapted study, and Spotify; it then presents the user-centered research that was conducted. A qualitative research method was adopted, and semi-structured in-depth interviews were chosen as the data collection technique. The sample consists of twenty Spotify users. The data obtained from the interviews conducted with the participants were analyzed descriptively, and the findings were categorized under five themes. In constructing the themes, the study of Siles et al. (2019) was followed; the interview data were interpreted under the themes of personalization, integration, rituals, resistance, and conversion. The research findings show that a dynamic of mutual domestication operates between the platform and the user, and that this process has a much more comprehensive character when compared with the study conducted on Netflix. At the same time, the study reveals that participants evaluate the platform-user relationship through a third actor, the music industry, and that user agency is shaped to a large extent within the framework of the possibilities offered by the platform.
- MakaleYalnız künye2012Scopus SJRQ3Generalization Strategies of Linear and Quadratic Pattern: A Comparison of 6th-8th Grade Students
Akkan, Yasar; Çakiroglu, Unal
Different representations of patterns have positive effects on the formation of the basis of algebra. Hence, it is important to investigate the strategies about pattern generalization for students' future learning about algebra. Thus, this study aims to define the generalizations about linear and quadratic patterns and also comparing the generalization strategies of 6th - 8th grades. The sample consisted of 18 students at 6th, 7th and 8th grades. The data collection tool has 4 problems and the collected data is classified through the generalization strategies in the related literature. The findings illustrate those at all linear and quadratic patterns, the variety and the correct generalization abilities are increasing due to the increasing of students' grades. Generally, most of the students used recursive or additive strategies, but only a few number of students used explicit strategies.
AtıfWoS3TR Dizin14
İncele - BildiriYalnız künye2018Network Master: A Versatile and User-Friendly Educational Software for Simulation of Neural Networks
Yildirim, Omer; Özcan, Zubeyir; Turhan, Hilal; Kayikçioglu, Temel
In this study, an interface in which neural networks consisting of biological cells could be modeled and simulated using Neuron hoc programming. With this interface, the resulting action potentials and the behavior of the nerve network can be investigated in detail by making the desired stimuli to mathematical models of neural networks. The most important feature of the work is that the designed interface is completely user friendly. Another advantage of this software is that users can easily perform simulations of the neural network models without writing code.
- Derleme MakaleAçık Erişim2018Edible Film and Coating Applications in Fruits and Vegetables
Okcu, Zuhal; Yavuz, Yasemin; Kerse, Sevgi
Different preservation and packing techniques are applied to maintain quality and safety during food transportation and storage. Changing in world and increasing consumer demands led to new techniques and procedures in packing. Light, easy opening, eco-friendly, bioplastic and edible packaging materials are improved to resolve problems that occured nowadays. Edible packaging material are environment-friendly because they decompose quickly in nature even if don't consume. In addition edible films increase food's organoleptic properties and support nutritional values when used with inserted supporting member. Fruits and vegetables are high sensitive product; therefore, attention should be paid while transporting and storing and they must be packed in the right way.. Delaying ripening and reducing loss of weight in fruit and vegetable could be supplied with edible films and coatings.
AtıfWoS17OpenAlex29TR Dizin3İncele - MakaleAçık Erişim2018Automatic extraction of building boundaries from high resolution images with active contour segmentation
Akbulut, Z.; Özdemir, S.; Acar, H.; Dihkan, M.; Karsli, F.
Building extraction from remotely sensed images plays an important role in many applications such as updating geographical information system, change detection, urban planning, disaster management and 3D building modeling. Automatic extraction of buildings from aerial images is not an easy task because of background complexity, lighting conditions and vegetation cover that reduces separability or visibility of buildings. As a result, automatic building extraction can be a complex process for computer vision and image processing techniques. In order to overcome this difficulty region-based active contour model was used to automatically detect the boundary of buildings for this study. To extract object boundaries, the model grows or shrinks the initial contour in the image. The main objective of this paper is making active contours algorithm perform without user interaction and to detect automatically initial contours to segment buildings with a software coded in Matlab. This task carried out by morphological operations, band ratio and thresholding methods. In this study, high resolution aerial images with 8 cm ground sampling distance (GSD) were used. Three separate test zones were selected with varying building level of detail on these images. Finally, it was assessed the accuracy of segmented buildings using Correctness, Completeness and Quality metrics by comparing the results images and manually digitized reference image. The proposed approach for building extraction from images was shown to be 98% accurate on buildings with simple geometry and homogeneous roof textures. However accuracy of extracted buildings with heterogeneous roof textures and lighting, and complex geometry is 89%. The results clearly show that automatically calculated initial contour positions work in accordance with the active contour algorithm and easily extraction of the buildings boundaries.
AtıfWoS12OpenAlex13TR Dizin5İncele - BildiriYalnız künye2021BroomyCell: An Introductory Educational Software for Neuroscience
Ozcan, Zubeyir; Yildirim, Omer; Kayikcioglu, Temel
Nerve cells are the basic building blocks of the nervous system. Therefore, the first step in neuroscience education is the introduction of nerve cells. However, both the complexity of nerve cells and the difficulty of their experimental examination make it difficult to test nerve cells practically. Therefore, simulation of nerve cells is found to be significantly effective. The difficulty of examining this type of cells experimentally shows its effect on neuroscience education. This brings to the fore the necessity of virtual laboratory environments designed for use in education. In this study, BroomyCell, which is designed by us as an introductory educational software in neuroscience education, was introduced. With this desktop application, it is aimed that potential neuroscientists learn their fields experimentally and without the need for a physical laboratory.
- MakaleYalnız künye2017Mathematical modeling of thin-layer microwave drying of corn husk and investigation of powder properties
Akdogan, A.; Koç, G. Caliskan; Dirim, S. N.
The aim of this study is to investigate the effect of different microwave powers on the drying kinetics of chopped corn husks and to determine the properties of the corn husk powder obtained after grinding the dried product. The drying behavior of corn husks was determined using eleven commonly used thin-layer models. The obtained powders were analyzed for moisture content, water activity, color, tapped and bulk densities, wettability, flowability, and cohesiveness. In addition, the effective moisture diffusivity and activation energy of corn husks were calculated from drying data. From the analysis of the results, the drying rate and the drying time of corn husk slices considerably decreased with increasing microwave power. Among all used drying models, the Page model was found to satisfactorily describe the kinetics of microwave drying of corn husk. The effective moisture diffusivity values ranged from 2.264x10(-10) to 8.941x10(-10) m(2)s(-1).
AtıfWoS2İncele - MakaleAçık Erişim2025Investigation of parents with high-risk infant on participation in care, depression, quality of life, and anxiety according to the infant's severity of neurologic impact
Sen, Muserref Ebru; Yakut, Hatice
Aim: The study aims to examine the psychological consequences such as anxiety levels, quality of life, depression, and participation in the care of parents with high-risk infants who have varying levels of neurological impact severity. Material and Methods: Forty high-risk infants and their mothers were included in the study. The infants were divided into three groups according to the Dubowitz Neurologic Assessment Scale. The State-Trait Anxiety Inventory (STAI), Edinburgh Postpartum Depression Scale (EPDS), Quality of Life Short Form 36 (SF-36), and the NICU Care Participation Scale were administered. Results: There were significant differences in the mothers' anxiety and depression levels (p < 0.001) and many parameters of quality of life according to the severity of neurological impact. However, it was determined that the severity of the neurological impact did not affect the mothers' participation in care (p > 0.01). Discussion: Although our study revealed that parents' depression, anxiety, and quality of life levels changed according to the severity of neurological impairment in high-risk infants, care participation was not affected. The limited sample size and the inability to generalize the results to different cultural and socioeconomic groups are important limitations. Nevertheless, it can be concluded that the medical condition of the newborn seriously affects the mental health of the parents.
- MakaleAçık Erişim2012Basic Disaster Consciousness and Preparation Levels
Inal, Ebru; Kocagöz, Semanur; Turan, Meliksah
Objectives The behaviors of individuals during disasters are determined by their level of disaster readiness and their knowledge of disaster threats. The aim of this research was to determine the basic disaster consciousness levels of individuals between the ages of 18 and 23. Methods The study included 291 students from Kelkit Aydin Dogan vocational school at the University of Gumushane. Each student completed a questionnaire with 10 informative questions about disaster consciousness. The data were evaluated using the chi-square test and the t-test. Results Not all 291 students answered each question. Of 285 students, 74.0% had not received any education on disaster preparedness. Of 249 students, 85.9% did not have a disaster preparedness plan. Of 266 students, 88.7% did not have an emergency kit. Out of 10 possible points, participants received 3.00 +/- 1.58 points on average for disaster preparedness. Conclusions The point average for student participants was quite low. Previous disaster training significantly increased the number of points received by participants. Disaster training should be extended to a wider range of individuals.
AtıfWoS9OpenAlex33TR Dizin33İncele - BildiriYalnız künye2016Detecting and Classifying Dominant Crowd Movements through Particle Advection
Akpulat, Murat; Ekinci, Murat
Today, trying to understand what kind of behaviour the crowd shows by studying the data from surveillance systems is an important topic for researchers of computer vision. The aim of this study make the motion data that is at pixel level and that is obtained by optical flow method a more meaningful data set with the particle advection method. In other words, the aim is to monitor the motion data by converting the 3D optical flow data set to a 2D data set. With this respect, evaluating how the crowd motion changes throughout the video by focusing only on the moments where there is motion can be carried out easily. At the end of the study, the success of the method is presented by testing how the image acts as a dominant movement.
- BildiriYalnız künye2017Observing the Entropy of Crowd Movements
Akpulat, Murat; Ekinci, Murat
Providing security and managing it as well as trying to understand how it behaves have become an important research topic in our day. The aim of this study is to calculate the entropy value of the crowd movement regionally and to track how it. changes in time. Because, excessive changes in the entropy value in time might point to abnormal behaviour in the region. The motion information obtained from the optical flow method from the image in parallel to the target was converted to motion orbits by particle advection. Motion orbits are mapped into by the Braid Theory and entropy value is calculated. Braid Theory is a mathematical method that is used to express entropy as a qualitative value by determining the interaction among the movement orbits. The results are tested according to the video sequence in the PETS2009 and UCF database and they show that this method is functional for observing how the entropy changes in time within the crowd movement.
- BildiriYalnız künye2023Shape of Masses in Contrast Mammography Images and First Order Statistical Features Classification Based on
Kobya, Mehmet Emin; Ture, Hayati; Dogan, Ramazan Ozgur; Kayikcioglu, Temel; Teymur, Aykut; Kul, Sibel
Mammography is a valuable tool in the diagnosis and staging of primary breast cancer. Contrast-enhanced mammography (CEM) combines an iodinated contrast agent with traditional mammography to increase diagnostic accuracy, especially in women with more dense parenchymal background patterns. In this study, a Decision Support System (DSS) is proposed that classifies masses using radiomic features obtained from masks of benign and malignant masses in images obtained with the CEM technique. An open-access database containing 2006 CEM images was used in this study. Radiomic features obtained from these images were used to identify differences between benign and malignant masses. The DSS uses these features to classify masses using a decision tree algorithm. This study highlights the importance of the use of iodinated contrast agents to improve diagnostic accuracy in women with more dense parenchymal background patterns. Additionally, it emphasizes the potential benefits of a DSS, in combination with radiomic features, in the diagnosis and staging of breast cancer. In conclusion, this study demonstrates that the use of radiomic features in mammography images obtained with the CEM technique is an effective way to classify benign and malignant masses.The use of this technology could be an important tool in the early diagnosis and accurate classification of breast cancer.
- MakaleAçık Erişim2025The effect of SARS-CoV-2 pandemic on anxiety levels and attitudes towards e-learning among sports sciences students
Türker, Ustun; Bostanci, Ozgur
Background and Study Aim The COVID-19 pandemic has led to significant changes in education and teaching processes, particularly affecting application-based disciplines such as sports science. This study aimed to examine the relationship between COVID-19-related anxiety and attitudes toward e-learning among sports sciences students. Material and Methods The study was conducted using a cross-sectional design with 2,479 students from 14 state universities in Turkey. Data were collected using the Coronavirus Anxiety Scale (CAS) and the Test of E-Learning Related Attitudes Scale (TELRA), and responses were gathered through online surveys. Parametric statistical analyses (t-test, correlation) were performed using SPSS at a significance level of p<0.05. Results Anxiety associated with the SARS-CoV-2 pandemic led to significant changes in the e-learning attitudes of sports sciences students. Students with higher levels of anxiety exhibited stronger tendencies toward technology use and perceived usefulness, whereas only limited differences were noted in satisfaction and motivation. Female students reported higher levels of symptoms and anxiety, while those who engaged in regular exercise demonstrated lower anxiety levels. Interestingly, within the high-anxiety group, students who did not regularly participate in exercise displayed more favorable e-learning attitudes. These findings suggest that anxiety may strengthen the inclination toward digital learning; however, this tendency does not always align with motivational commitment. Conclusions The e-learning attitudes of sports sciences students during the pandemic were influenced by factors such as technological competence, psychological state, gender, exercise habits, and the requirements of practical courses. The findings highlight the importance of designing hybrid and flexible learning models in times of crisis, in a manner that integrates psychological support with pedagogical needs.
- MakaleAçık Erişim2026Scopus SJRQ4INVESTIGATION OF THE EFFECT OF INSTRUMENT-ASSISTED SOFT TISSUE MOBILIZATION IN INDIVIDUALS WITH LUMBAR DISC HERNIATION: A RANDOMIZED CLINICAL TRIAL
Tas, Muhammed Usame; Usgu, Gunseli
Purpose: This research evaluated the effects of the instrument-assisted soft tissue mobilization (IASTM) technique in individuals with lumbar disc herniation (LDH). Methods: Forty LDH patients were randomly assigned to a control group or an IASTM group (20 patients in each group). The IASTM group underwent a treatment protocol consisting of two IASTM sessions per week in addition to classic physiotherapy methods (hotpack, transcutaneous electrical nerve stimulation, ultrasound and exercise) over a four week period. The treatment specifically targeted the paraspinal muscles, gluteus maximus, gluteus medius and hamstring muscles. All participants were assessed before treatment, immediately after treatment and two months post-treatment using various measures, including pain intensity visual analog scale, straight leg raise (SLR) test, slump test (measuring knee extension from 90 degrees flexion), 6-minute walking test (6-MWT), range of motion (ROM) and the Short Form-36 (SF-36) questionnaire. Results: Both groups experienced a significant decrease in pain immediately after treatment (p=0.002). However, although both groups showed improvements in post-treatment SLR, slump test, 6-MWT, ROM, and SF-36 scores, no significant correlations were found (p=0.208). However, the IASTM group experienced greaterclinical improvement across all parameters. Conclusion: The findings suggest that incorporating IASTM techniques into physiotherapy programs for individuals with LDH can enhance rehabilitation outcomes.
- MakaleYalnız künye2018The Impact of Image on Corporate Reputation: The Case Of Giresun Municipality
Güllüpunar, Hasan; Tekmen, Tuba
The perception of a corporation by its environment is based on the presented conducts, produced service or product, and established communication with the target group in this process. This is the result of active communication between the source and the recipient. At the same time, there are marks of the past and the future in this perception. Both the total perception that has developed based on the interaction between the corporation and target groups for different reasons in the past, and the emotion that this interaction creates in relation to the future affect the outlook on the corporate outputs. Therefore, two types of perception can be defined by the environment of an institution. The first is a perception that is defined by the active communication process based on corporate behaviour, product, or service. The second is a perception that is an important factor in the background of the first perception and at the same time it is related to the past and the future which is affected from the first perception. These are defined in the literature as image and reputation. This study inquires into the effect of the citizens' impressions provided by the municipalities in terms of the president, staff or services on the general perception of the municipalities. In this context, a survey was conducted in Giresun city centre regarding Giresun Municipality. In the research, image factors related to municipality services and the power of representatives of Giresun Municipality based on the president and the staff were determined and then the effect of these factors on Giresun Municipality's general perception was examined. In the study, it was concluded that the image factors are important explanations of the general perception of the municipality and the biggest 'factor on the general perception is the mayor 'factor.
AtıfWoS1İncele - MakaleAçık Erişim2018AN ANALYSIS OF THE IMPACT OF INSTITUTIONAL STRUCTURE ON TOURISM IN THE MEDITERRANEAN COUNTRIES
Artan, Seyfettin; Hayaloglu, Pinar; Demirel, Selim Koray
Institutional economics literature suggests that inclusive institutions encourage economic growth by increasing efficiency in many sectors of the economy. Institutional structure also has effects on the tourism sector due to the confidential environment and incentives it brings. In this context, when studies on determinants of tourism are examined, it is remarkable that there are a number of studies on economic and social factors, but that there are limited studies about institutional determinants of tourism. This study investigates the causal relationships between institutional factors and tourism sector in nine Mediterranean coastal countries also including Turkey for the period of 1995-2015 by using Konya (2006) panel causality analysis. The results of the study using variables of corruption and democratic accountability as indicative of institutional structure reveal causal relations between tourism expenditures and institutional factors.
AtıfOpenAlex2İncele - BildiriYalnız künye2017Hardware Friendly Early Stopping Structure For Polar Code
Simsek, Cemaleddin; Albayrak, Cenk; Türk, Kadir
Polar code has become a major milestone in information theory field in recent times. Researchers are still observing more efficient encoding and decoding structures. In this study, a new WIB based structure is proposed which reduces the computational complexity of WIB introduced as an early termination method for BP polar decoder in literature. Both proposed and WIB methods are implemented with VHDL and hardware complexities are compared via XILINX ISE synthesis tool. Most important complexity reduction came with removing unnecessary addition operations which make early termination method possible to implement only with hit-wise logical operations. Results show that along with complexity reduction proposed approach can also acquire same performance in half time compared to previous counterpart with fewer logic gates.
- MakaleYalnız künye2023Scopus SJRQ4Wear Behavior of Dental Restorative Materials
Sen, Sadri; Zamanlou, Hamid; Karabudak, Filiz; Süküroglu, Ebru Emine
Gradual wear of opposing teeth is a normal phenomenon in human dentition. There is a need for quality dental restorative materials to repair or replace natural teeth to ensure a higher quality of life through dental health. One of the main physiological mechanism that exists in dental materials during normal muscle function is called abrasion. There are two types of that in teeth which are common; Two-body and three-body. If the teeth are contacted directly, it is referred to as two-body abrasion. However, when there is abrasive slurry-like food between the teeth, this abrasive is called to be three-body abrasive. Several types of materials are available in current dentistry for teeth restoration and replacement, and new materials are being promoted every year. Dental specialists need to understand the wear mechanisms of these new types of dental restorative materials, alone or in combination with either enamel or other dental restorative material. The present study evaluates the abrasive resistance of three restorative materials groups: direct composites, indirect composites, and ceramics. To define the resistance of the wear, the authors then perform a micro-wear test on chosen materials. The results show that the wear mechanism is abrasive due to its low hardness compared to zirconia ball. The wear path in the nanohybrid (Grandio (R), 87s% w/w (71s% volume) inorganic nanohybrid filler, BisGMA, UDMA, TEGDMA) sample was smooth and without particles. In this study wear FEM analysis calculated for all models and the answers compared with experimental data.
- MakaleAçık Erişim2024The Development of The Self Efficacy Belief Scale for Teaching the Holy Qur'an
Birinci, Ali; Akyildiz, Salih
The teaching of the Qur'an can be defined as the process of planning, implementing, and evaluating external activities that support and enable the learning of the Qur'an. This process is carried out according to different age groups and levels in both formal and informal education institutions. The professional self-efficacy of the teachers/tutors plays an important role in the achievement of the goals set for the reading and teaching of the the Holy Qur'an. In this context, this research, which aims to develop a valid and reliable scale that can be used to measure self-efficacy beliefs in teaching the Holy Qur'an, was conducted using a survey design. The target population of the study consists of 570 teachers of religious culture and ethics working in formal education institutions in Trabzon. The study group was divided into two groups in order to conduct exploratory and confirmatory factor analyses, and the normality assumptions of both groups were satisfied. As a result of exploratory factor analysis (EFA) conducted on the first group data, a two-factor structure emerged. These factors were designated Reading the Holy Qur'an and Teaching the Holy Qur'an. The item load values exhibited a range of 0.642 to 0.889. It was observed that the first factor explained 36.239% of the variance, the second factor explained 33.857% of the variance, and the entire scale explained 70.096% of the variance, respectively. In the confirmatory factor analysis (CFA) conducted on the second group data, chi 2/df: 2.635, RMSEA: 0.08, SRMR: 0.04, AGFI: 0.83, GFI: 0.88, CFI: 0.95, TLI: 0.94, NFI: 0.93 and IFI: 0.95 fit indices were obtained. The item-total correlations of the scale vary between 0.533 and 0.832. It was observed that the item discrimination analyses obtained as a result of the mean scores of the 27% lower and 27% upper groups of the scale were significant (p<.001) The internal consistency coefficient of the scale was found to be .91 in the Reading the Holy Qur'an dimension, .94 in the Teaching the Holy Qur'an dimension, and .95 for the entire scale. the scale is a valid and reliable instrument for measuring teachers' and Qur'an course instructors' self-efficacy beliefs in teaching the Qur'an.
AtıfOpenAlex1TR Dizin1İncele
