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Department: Atılım UniversitySubject: performance assessment

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    Article
    Citation - WoS: 3
    Citation - Scopus: 6
    Investigating the Impact of Two Major Programming Environments on the Accuracy of Deep Learning-Based Glioma Detection From Mri Images
    (Mdpi, 2023) Yilmaz, Vadi Su; Akdag, Metehan; Dalveren, Yaser; Doruk, Resat Ozgur; Kara, Ali; Soylu, Ahmet
    Brain tumors have been the subject of research for many years. Brain tumors are typically classified into two main groups: benign and malignant tumors. The most common tumor type among malignant brain tumors is known as glioma. In the diagnosis of glioma, different imaging technologies could be used. Among these techniques, MRI is the most preferred imaging technology due to its high-resolution image data. However, the detection of gliomas from a huge set of MRI data could be challenging for the practitioners. In order to solve this concern, many Deep Learning (DL) models based on Convolutional Neural Networks (CNNs) have been proposed to be used in detecting glioma. However, understanding which CNN architecture would work efficiently under various conditions including development environment or programming aspects as well as performance analysis has not been studied so far. In this research work, therefore, the purpose is to investigate the impact of two major programming environments (namely, MATLAB and Python) on the accuracy of CNN-based glioma detection from Magnetic Resonance Imaging (MRI) images. To this end, experiments on the Brain Tumor Segmentation (BraTS) dataset (2016 and 2017) consisting of multiparametric magnetic MRI images are performed by implementing two popular CNN architectures, the three-dimensional (3D) U-Net and the V-Net in the programming environments. From the results, it is concluded that the use of Python with Google Colaboratory (Colab) might be highly useful in the implementation of CNN-based models for glioma detection. Moreover, the 3D U-Net model is found to perform better, attaining a high accuracy on the dataset. The authors believe that the results achieved from this study would provide useful information to the research community in their appropriate implementation of DL approaches for brain tumor detection.
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    Article
    Citation - WoS: 24
    Citation - Scopus: 19
    A Flipped Classroom in Communication Systems: Student Perception and Performance Assessments
    (Sage Publications Ltd, 2019) Oncel, Alcsay Fatih; Kara, Ali
    Flipped classroom is an emerging course delivery method, where the traditional in-class and out-of-class activities flip places. The lectures are given out-of-class with electronic resources and in-class time is reserved for group activities and discussion with the instructor. In this study, we present our implementation of a flipped classroom in a senior level undergraduate engineering course. An extensive perception analysis was carried out with anonymous surveys and face-to-face interviews with students. Performance analysis of the flipped class was carried out by comparing the achievement level in the course learning outcomes of previous years' traditional classes and recent year's flipped class. The out-of-class lectures were implemented as machine-voice-narrated presentations. The effect of machine voice on the flipped classroom is also examined. Students' perception and reaction to various aspects of the flipped class are documented. Performance analysis showed a significant improvement in one category of course learning outcomes. Student perception was positive overall.