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Öğe Development and experimental validation of a novel algorithm to estimate the speed of objects moving faster than the capture speed of cameras(Elsevier Sci Ltd, 2020) Yildiz, IbrahimMeasuring the vibration frequency of structures with image processing methods is one of the non-contact measurement methods. However, the frequency to be measured should be lower than the camera capture speed. In this study, a method was developed to extract and to compare pattern characteristics of data acquired from a pixel of a low-speed camera. At the first stage, images of a rotating disk were recorded at known frequencies to find out the camera's response. After that, distinctive features were extracted both from the raw and clustered intensity data acquired from the pixels of the recorded images. At the second stage, pixel intensity data of a rotating disk with an unknown frequency was also recorded with the same camera. Similarly, features were extracted from these data, and they were compared with the features at known frequencies. A frequency range was found for the unknown frequency value in this way. Finally, the unknown frequency value was estimated by interpolation in the frequency range. The method was verified on an experimental setup, and five unknown frequency values were successfully estimated. Consequently, higher frequencies than the capture speed of the camera were correctly estimated using the developed method. On the other hand, it was also noticed that the clustering of the discrete intensity data was also significant.Öğe Development of a wireless blood pressure measuring device with smart mobile device(Elsevier Ireland Ltd, 2016) Ilhan, Ilhan; Yildiz, Ibrahim; Kayrak, MehmetToday, smart mobile devices (telephones and tablets) are very commonly used due to their powerful hardware and useful features. According to an eMarketer report, in 2014 there were 1.76 billion smartphone users (excluding users of tablets) in the world; it is predicted that this number will rise by 15.9% to 2.04 billion in 2015. It is thought that these devices can be used successfully in biomedical applications. A wireless blood pressure measuring device used together with a smart mobile device was developed in this study. By means of an interface developed for smart mobile devices with Android and iOS operating systems, a smart mobile device was used both as an indicator and as a control device. The cuff communicating with this device through Bluetooth was designed to measure blood pressure via the arm. A digital filter was used on the cuff instead of the traditional analog signal processing and filtering circuit. The newly developed blood pressure measuring device was tested on 18 patients and 20 healthy individuals of different ages under a physician's supervision. When the test results were compared with the measurements made using a sphygmomanometer, it was shown that an average 93.52% accuracy in sick individuals and 94.53% accuracy in healthy individuals could be achieved with the new device. (C) 2015 Elsevier Ireland Ltd. All rights reserved.Öğe The Effect of Morphine Dependence and Morphine Withdrawal on Neuritin and Some Markers of Neurogenesis in the Rat Hippocampus(Wiley, 2023) Cimen, Yasin Ali; Yildiz, Ibrahim; Gunes, Canan Eroglu; Ozkurkculer, Alpaslan; Kurar, Ercan; Kutlu, Selim[Abstract Not Availabe]Öğe Effect of Morphine Dependency on Apelinergic System in Rat Hippocampus(Wiley, 2022) Yildiz, Ibrahim; Cimen, Yasin Ali; Eroglu, Canan; Ozkurkculer, Alpaslan; Kurar, Ercan; Kutlu, Selim[Abstract Not Availabe]Öğe Effect of Naloxone Precipitated Morphine Withdrawal on Melatonin Receptor Expressions in Hippocampus and Hypothalamus Tissues in Morphine Dependent Rat(Karger, 2021) Cimen, Yasin Ali; Gunes, Canan Eroglu; Yildiz, Ibrahim; Ozdengul, Faik; Kurar, Ercan; Meral, Ismail; Kutlu, Selim[Abstract Not Availabe]Öğe Evaluation of upper extremity ataxia through image processing in individuals with multiple sclerosis(Assoc Arquivos Neuro- Psiquiatria, 2022) Erdeo, Fatma; Yildiz, Ibrahim; Uca, Ali Ulvi; Altas, MustafaBackground: Impaired dexterity is a frequently reported disability among people with ataxic multiple sclerosis (MS). Objective: To quantify and standardize the evaluation of upper extremity coordination disorder among patients with multiple sclerosis (MS), using the Tablet Ataxia Assessment Program (TAAP). Methods: The X and Y axis movements of 50 MS patients and 30 healthy individuals who were evaluated using the International Cooperative Ataxia Rating Scale (ICARS) were also assessed using TAAP. The functional times of the participants' right and left hands were recorded using the nine-hole peg test (NHPT). The upper extremity coordination of individuals with MS was evaluated using the upper extremity kinetic functions section of ICARS. Results: The deviations for the X and Y axis movements of the MS group were greater than those of the control group (p<0.05). Significant correlations were shown between TAAP scores and NHPT and ICARS scores. The strongest correlation was found between NHPT and ICARS in the dominant hand (r(nhpt)=0.356, p(nhpt)=0.001; r(icars)=0.439, p(icars)=0.000). In correlating the Y axis with ICARS, the deviations in the Y axis were found to be greater in the non-dominant hand than those in the X axis (r(yright)=0.402, p(yright)=0.004; r(yleft)=0.691, p(yleft)=0.000). Conclusion: Measurement using TAAP is more sensitive than other classical and current methods for evaluating ataxia. We think that TAAP is an objective tool that will allow neurorehabilitation professionals and clinicians to evaluate upper extremity coordination.Öğe Evaluation of upper extremity ataxia through image processing in individuals with multiple sclerosis(Assoc Arquivos Neuro- Psiquiatria, 2022) Erdeo, Fatma; Yildiz, Ibrahim; Uca, Ali Ulvi; Altas, MustafaBackground: Impaired dexterity is a frequently reported disability among people with ataxic multiple sclerosis (MS). Objective: To quantify and standardize the evaluation of upper extremity coordination disorder among patients with multiple sclerosis (MS), using the Tablet Ataxia Assessment Program (TAAP). Methods: The X and Y axis movements of 50 MS patients and 30 healthy individuals who were evaluated using the International Cooperative Ataxia Rating Scale (ICARS) were also assessed using TAAP. The functional times of the participants' right and left hands were recorded using the nine-hole peg test (NHPT). The upper extremity coordination of individuals with MS was evaluated using the upper extremity kinetic functions section of ICARS. Results: The deviations for the X and Y axis movements of the MS group were greater than those of the control group (p<0.05). Significant correlations were shown between TAAP scores and NHPT and ICARS scores. The strongest correlation was found between NHPT and ICARS in the dominant hand (r(nhpt)=0.356, p(nhpt)=0.001; r(icars)=0.439, p(icars)=0.000). In correlating the Y axis with ICARS, the deviations in the Y axis were found to be greater in the non-dominant hand than those in the X axis (r(yright)=0.402, p(yright)=0.004; r(yleft)=0.691, p(yleft)=0.000). Conclusion: Measurement using TAAP is more sensitive than other classical and current methods for evaluating ataxia. We think that TAAP is an objective tool that will allow neurorehabilitation professionals and clinicians to evaluate upper extremity coordination.Öğe Frequency of EGFR Mutation in Nsclc and Its Relationship with Clinicopathological Features: A Multicenter Asmo Trial(Elsevier Science Inc, 2015) Yuksel, Sinemis; Kodaz, Hilmi; Yildiz, Ibrahim; Odabasi, Hatice; Ocak, Ayse; Bayoglu, Ibrahim V.; Hacibekiroglu, Ilhan[Abstract Not Availabe]Öğe Hippocampal and Hypothalamic FBN1 Expression in an Experimental Opioid Addiction Rat Model(Karger, 2021) Gunes, Canan Eroglu; Cimen, Yasin Ali; Yildiz, Ibrahim; Kurar, Ercan; Kutlu, Selim[Abstract Not Availabe]Öğe A Low-Cost and Lightweight Alternative to Rehabilitation Robots: Omnidirectional Interactive Mobile Robot for Arm Rehabilitation(Springer Heidelberg, 2018) Yildiz, IbrahimRobotic rehabilitation is a growing field. Robots facilitate repetitive therapies, which have positive effects on the rehabilitation of patients who lack arm control because of central nervous system lesions. However, the use of such rehabilitation robots is rare due to high costs and low acceptance among patients. Therefore, this study is focused on the development and control of a novel low-cost omnidirectional interactive mobile robotic platform with force feedback to assist and guide a patient's hand during therapy. The primary goals for such a mobile robot are to minimize its weight and dimensions, which are significant factors in patient acceptance. Position-based stiffness control was employed with a proportional derivative controller to control the position of the robot and to assist the patient during motion. A user interface with given tasks was built to manage tasks, obtain test results and set control variables. Test results showed that the developed experimental mobile robot successfully assisted and guided the user during the test period.
