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Öğe Investigation of the network made with the complementary motor of the thalamus with the DTI method in individuals with tinnitus(Kare Publishing, 2024) Elpen Karyemez, Pınar; Yağımlı, Mustafa; Tozan, HakanObjectives:This This study aimed to investigate the differences in the networks between the thalamus and the supplementary motor area in brain MRI examinations of individuals with subjective chronic tinnitus and healthy control groups. Methods: In the study, brain MRI imaging was performed on 47 patients suffering from bilateral tinnitus for two years or more and 42 healthy individuals. The tensor information obtained using the diffusion tensor imaging sequence data obtained from both groups was processed in the DSI Studio program. Brain connection maps were obtained from the data obtained. Quantitative information of the individual connecogram maps of each case was recorded and the groups were compared. Results: In the tinnitus group, there is an increase in the pathways between the thalamus and the supplementary motor area. In addition, it was determined that the pathways of the thalamus with the hippocampus, superior and middle occipital area and frontal area increased, and the pathways with the hippocampus and cerebellum decreased. Conclusion: Important functions of the supplementary motor area and thalamus; These are cognitive actions in which attention plays an important role, such as noticing the stimulus from the environment, planning and implementing the response action. It is thought that changes in the pathways between the thalamus and the supplementary motor area will especially affect attention-related functions.Öğe Analysis and evaluation of quality parameters of commercial propolis products using a new high Performance Liquid Chromatography (HPLC) method and Comparison of antimicrobial properties(Elsevier Inc., 2024) Karagül, Bora; Uğraş, Serpil; Karagül, Pınar; Usta, Mehtap; Uğraş, Halil İbrahimPropolis, which has an important place in functional foods, is a natural bee product with high biological active value and is consumed in different formulations and packages worldwide. Thanks to the active compounds it contains, propolis shows biological properties such as antibacterial, antifungal, antiviral, antiprotozoal, antitumoral, antiulcer and anti-inflammatory. However, it is seen that propolis supplements are prepared unconsciously in the market. Such commercial products need to be standardized. Within the scope of this study, characteristic compounds of Turkish propolis were initially determined with support from the literature. Subsequently, bioactive components of 23 commercial propolis products were analyzed using the new HPLC method. Then, the flavonoid content and antimicrobial activity of the samples were determined. According to the results of these analyses, the amounts of Caffeic Acid (2,16-1620,57 ppm, Quercetin (0,19-203,99 ppm), Apigenin (0,30-319,08 ppm), Kaempferol (0,56-251,15 ppm), Chrysin (3,97-2830,93 ppm), and Caffeic Acid Phenethyl Ester (13,08-9666,48 ppm) were found to be quite different. The highest flavonoid content was measured as P2: 20847,43 mg/L and the lowest was 00003,10 mg/L in sample P13. Samples prepared for children were found to be highly diluted in terms of content. Again, it was determined that the samples with high preservation of active ingredients were products with production certificates based on laboratory analyzes. The samples were generally found to have inhibition activity against Gram (+) bacteria. Propolis samples P6 and P22 showed high activity against Gram (+) and Gram (-) bacteria and even fungi. When we evaluated some products that are insufficient in terms of content and antimicrobial activity, it was observed that antimicrobial activity increased depending on the other auxiliary chemicals used in the products. In this context, propolis products, which are very valuable in terms of health, may lose their real activity due to uncontrolled production and will gradually be devalued in the market. It is important that this valuable product should be produced and offered to the market with the necessary analysis methods without losing its effectiveness.Öğe APPLICATION FOR DISSOLUTION OF CORONARY ATHEROSCLEROTIC PLAQUE: A NEW TREATMENT?(Elsevier Ireland Ltd, 2023) Yolay, O.; Kasapbasi, E.; Ozturk, V.; Tezcan, E.; Karaoglu, H.; Kucuk, C.; Haziroglu, C.[Abstract Not Available]Öğe Investigation of Obsessive Compulsive Disorder with FFT Dipol Approximation by Means of EEG(IEEE, 2015) Özçoban, Mehmet Akif; Aydın, Serap; Kara, Sadık; Tan, OğuzEEG analysis has been used in pathophysiological research of Obsessive Compulsive Disorder (OCD) that is one of the neuropsychiatric disease. EEG abnormalities was observed in brain cortex of patients with OCD. Fast Fourier Transform (FFT) Dipol Approximation Method (FFTDA), used for source localization and superior to conventional FFT method, has also been used for measurement of the level of EEG synchronization. In this research, phase differences between cortical neural oscillations was computed by using FFTDA. Then, analysis of 19 channel EEG series, collected with international 10-20 electrode placement system, shows the loss of Theta band phase synchronization in patients with OCD.Öğe AN EVALUATION STUDY: RECENT DEVELOPMENTS AND PROCESSING OF GLASS SCRAP RECYCLING(John Wiley & Sons, 2012) Ertug, Burcu; Unlu, NecipOn average, one out of two glass bottles coming on to the market is provided by recycling processes in Europe. Glass recycling has been started by the early of 1970s in Turkey, and the recycling amount has been reached to 70 thousand tons recently, while 4.2 million tons which represents only 25 percent of total glass manufactured, is the amount of glass collected annually for recycling in the world. The glass recycle process basically involves collecting, sorting, then crushing and grinding after which glass cullet is produced as the secondary raw material. Removing of the contaminants from the glass cullet, and then melting are the next steps. In this study, recent developments of 100% recyclable without any deterioration in quality, and never decomposable glass, are discussed detailed in terms of glass production processes.Öğe INVESTIGATION ABOUT THE OPTIMUM ALTERNATIVE OF POLYPROPYLENE FIBERS IN CONVENTIONAL CONCRETE(Taylors Univ Sdn Bhd, 2022) Mahdi, Zainab H.; Kadhum, Mohammed M.; Abdulghani, Mays R.; Abdulghani, Ghaith R.; Hwaiai, Duhuha A.This study was performing to find out the optimal alternative to expensive polypropylene fibers. This alternative was chicken's keratin-fibers, which were treated with chromium trioxide to eliminate the living materials. Several mixtures were ready using a mixing ratio of 1:1.5:3 (cement: sand: gravel) with keratin or polypropylene fibers, water, and a superplasticizer. Compressive strength, electrical resistance, and ultrasonic pulse velocity were tested by using cubic samples. The load-deflection relation was also tested by testing the reinforced concrete beam sample. The specimens that contain 1% of keratin-fibers showed enhancement in compressive strength, the percentage of increase of about (18.47, and 12.50)% compared with the reference sample and 1% polypropylene sample, respectively at the age of twenty-eight days. The electrical resistance of samples containing 1% and 2% of keratin-fibers was slightly less than the samples containing 1% and 2% polypropylene-fibers. The ultimate-flexural-load for beams that strengthened with 1% of keratin-fibers gave higher values (19.20 kN) than samples of (1 and 2)% polypropylene (17.30 and 17.10) kN and 2%keratin-fibers (18.98 kN) also, while the percentage of 2% keratin- fibers gave ultimate at deflection higher (0.337 mm) than the samples of (1 and 2) % polypropylene and 1 % keratin-fibers samples.Öğe Investigation the Level of Neural Synchronization by Using Global Field Synchronization Method in Obsessive Compulsive Disorder(IEEE, 2014) Ozcoban, Mehmet Akif; Kara, Sadik; Tan, Oguz; Aydin, SerapObsessive Compulsive Disorder (OCD) is a neuropsychiatric brain disorder disease and diagnosis, treatment process of the disease is used EEG analysis. Recent studies suggested that the OCD is caused by dysfunction in brain's frontal lobe. The GFS that was developed as a novel synchronization criteria, computes phase difference between neural oscillations in the brain. Studies were published that indicates fall of GFS values. In this study, it was investigated how OCD effect phase difference between neuronal oscillations. For this purpose, results of the GFS method was applied to 19 channels EEG, indicates OCD decrease of neural synchronization in brain's frontal lobe at Delta and Beta 3 frequency bands..Öğe Classification of EEG Synchronization Values of Obsessive Compulsive Disorders Patients Using Support Vector Machine Method(IEEE, 2015) Tan, Oguz; Ozcoban, Mehmet Akif; Aydin, SerapObsessive Compulsive Disorders causes disruptive effect on brain oscillations. One of this disruptive effects is loss of synchronization. Global Field Synchronization indice that is calculated by Global Field Synchronization Method can detect degree of synchronization of EEG. According to analysis results, significantly difference was found between Global Field Synchronization Indice of OCD patients and healthy group in theta and delta frequency bands. For the purpose of testing success of GFS method in detecting OCD, GFS values of OCD patients and healthy group classified with Support Vector Machine method. In order to increase the performance of classification model, training and test data was selected by Cross Validation Method. Accuracy rate of classification results was found at 94.75 in delta band and 78.048 percent in theta band. The system can assist the physicians for diagnosing OCD. The classification results has shown that GFS is a successful method for to diagnose OCD.Öğe ACTIVE LIFE CENTER: A TURKISH MODEL FOR TEACHING STUDENTS WITH DISABILITIES(Sagamore Publ Llc, 2016) Ozer, Dilara; Grenier, Michelle; Nalbant, Sibel; Ozcan, Gulsum HatipogluIn Turkey, there are many kinds of educational environments for children with disabilities. Some of these are inclusive; others are special education classes within the mainstream schools. A third category includes separate, special education schools. There are also Special Education and Rehabilitation Centers (SERC) that provide support to all children including those with severe disabilities. While there are mandatory employees such as physical therapists, child development specialists, psychologists and special education teachers, there are no physical education or adapted physical education teachers included as part of the special education teams in the rehabilitation centers. As a result, children placed in the centers receive little attention in the area of physical education. This article describes the experiences of children and their families involved with the Active Life Center in Istanbul, Turkey as well as the programs and research initiatives associated with the center. Founded in 2012, the center is designed to support the rights of children with disabilities to participate in sport and physical activity through a variety of programs.Öğe Smart Adaptronic Thermal Management System Designs for The Li -ion Battery Packs(IEEE, 2021) Joula, Mohammad; Dilibal, Savas; Owusu-Danquah, JosiahLi-ion battery packs are used in varied industrial fields, such as automotive, drone, and e-bike industries. Low temperature insulation and high temperature heat conduction are required for an ideal thermal management of battery pack. In this study, an autonomous system design is developed for a smart adaptronic Battery Thermal Management System (BTMS). We proposed two different nickel-titanium (NiTi) shape memory alloy (SMA)-actuated smart adaptronic BTMSs. The actuation strain of the system is examined using a computational NiTi shape memory alloy model for material selection. The model results showed that an actuation strain of 3.8 % can be obtained for the operating temperatures range between 15 C and 80 C. The model results is used to unveil the required properties of NiTi SMA wire. The proposed adaptronic BTMS design solutions can create competitive advantages with their compact, low-cost, and lightweight structures in industry.Öğe INVESTIGATION OF ELECTRICAL PROPERTIES OF CIGS THIN FILMS DERIVED BY SOL-GEL PROCESS(John Wiley & Sons Inc, 2014) Baydogan, N.; Canci, U.; Akyol, S.; Cimenoglu, H.The effects of deposition temperature on copper indium gallium diselenide Cu(In,Ga)Se-2 (CIGS) thin-film were examined to apply this layer in the CIGS solar cells. Electrical resistivity of CIGS layers was determined after CIGS thin films were deposited by sol-gel dip coating technique on substrates. The desired electrical resistivity is determined after annealing. The variations in electrical resistivity are investigated for the use in CIGS solar cells.Öğe DEPRESSION, HOPELESSNESSAND SUICIDALITY IN PSORIASIS PATIENTS(Acta Dermato-Venereologica, 2019) Altunay, Ilknur Kivanc; Deniz, Fatma; Mercan, Sibel[Abstract Not Available]Öğe Analysis of Frontal Phase Synchronization in OCD Patients(IEEE, 2018) Ozcoban, Mehmet Akif; Tan, Oguz; Akan, AydinObsessive Compulsive Disorder (OCD) is a common neuropsychiatric disorder in the society. Functional disorders in the frontal side were detected in the clinical evaluation of OCD with brain imaging systems. In this study, the effects of the OCD on the frontal part are investigated with Intertrial Phase Clustering (ITPC) method. According to the analysis results, significant loss of synchronization was found in all EEG bands for 6 electrodes on the frontal region. In addition, that these results are consistent with the results obtained by imaging devices, it was also indicated that decreased synchronization cause functional dysconnectivity. Besides, when evaluated together with the results of studies investigating the relationship between EEG waves and cognitive functions, it also indicates that OCD may cause many cognitive impairments, such as loss of memory and attention.Öğe Investigation of EEG Relative Power Spectral Changes in Obsesive Compulsive Disorder Patients(IEEE, 2017) Akan, Aydin; Ozcoban, Mehmet Akif; Tan, OguzObsessive Compulsive Disorder (OCD) is a neuropsychiatric disorder that usually negatively affects feelings and thoughts of adolescent adversely. Studies of OCD with imaging methods have found intense mental activity in the frontal region. In this study, relative power values are calculated for the channels representing the frontal regions. These values were compared with the data values of the data obtained from healthy volunteers. After statistical analysis, power values of OCD patients were found higher in the teta and alpha frequency regions than in the control group. These values found in the alpha band, which are known to be important for mental activities, show a good deal of previous work done with imaging methods.Öğe 2D Coverage Analysis of Sensor Networks with Random Node Deployment(IEEE, 2017) Birtane, Sibel; Kazdal, Seda; Sahingoz, Ozgur KorayIn last few decades, as a result of the advances in microelectromechanical systems, Wireless Sensor Networks (WSNs) have gained a considerable attention due to their low-cost, low-power and small-scale sensor nodes which are used to integrate sensing, processing, communicating capabilities to solve many different real world problems. The placement of sensor nodes is a very important step to cover the theater of these application areas. Increasing the coverage of WSN system is one of the important research interests to determine the quality of service of the system. The location of sensor nodes can be determined by humans to increase the coverage area. However, in the remote or hostile environments, the random deployment of sensor nodes is needed to be used. In this paper, the different random deployment techniques have been studied, and the experimental results are obtained have been shared to show the effectiveness of these techniques. Finally, the alternative approaches are mentioned to guide the researchers, as well.Öğe Dermatological and psychiatric manifestations in heroin and bonsai use disorder(Pacini Editore, 2020) Can, Yesim; Altunay, Ilknur Kivanc; Mercan, Sibel; Evren, Cuneyt; Pospos, Ozlem Helin; Ozkur, EzgiBackground: In in cases of substance use disorder (SUD), dermatological findings may provide significant information about the mental state of the patients involved. Awareness of cutaneous signs together with psychiatric manifestations may be an effective way to address the issue of treating substance use. Aims: This study aims to detect cutaneous signs and mental state of patients with heroin and bonsai use disorder through dermatological and psychiatric examinations. Methods: 156 male inpatients with SUD (heroin, n=104 and bonsai, n=52) were included. A standart personal information form, the Symptom Checklist-90-Revised (SCL-90-R) and the Drug Use Disorders Identification Test (DUDIT) were filled out by each patient. Assessment of patients' psychiatric condition and their dermatological examinations were performed by the same psychiatrists and the same dermatoalogist. Tattoos and self-inflicted scars (SIS), which were the result of self-harm behavior (SHB) were rated separately. Results: The most frequent and dramatic findings in all SUD cases were tattoos (n=70), SIS (n=64), traumatic scars (n=59), cutaneous infections (n=49), acne (n=42), and vascular lesions (n=18). Injection scars, and vascular lesions were detected at higher rates in heroin users, while acne lesions were significantly more frequent in bonsai users (p =.022). The rates recorderd for having tattoos were 32.7% (n=17) in bonsai users and 51% (n=53) in heroin users. The age of onset for first substance use, and regular substance use, besides the patients' age at first treatment were both lower in tattoo patients than in those without tattoos. From subscale scores of SCL 90-R, the somatization, depression, interpersonal sensitivity, anxiety scores were all higher in heroin users than in bonsai users. Conclusions: Physicians should be aware of dermatological clues in SUD patients. Evaluation of dermatological findings including tattoos is important in detecting SUD and obtaining information on the mental state of the patients.Öğe DESIGNING OF A MODEL OF ELECTRICAL CONTROLLED ABOVE KNEE PROTHESIS(IEEE, 2015) Ege, Mucahit; Kucuk, SerdarIn this study, a mechanical model of electrically controlled above knee prosthesis was designed. Since the parameters such as ergonomic structure, height, weight, energy consumption, velocity, torque and electromechanical control are very important for prosthesis, the new prosthesis was designed considering these parameters. In literature, studies are mostly performed in flat surfaces because of straight forwardly designing and manufacturing above knee prosthesis. However in this study, a universal joint that provides foot inversion and eversion was added to the ankle in order to make the prosthesis to walk different surface conditions. Likewise a toe joint was also mounted for achieving walking convenience and aesthetics. Finally, forward kinematics model was derived and position and orientation data was obtained during the walking.Öğe THE IMPACT OF TURKEY'S POLICY TOWARD SYRIA ON HUMAN SECURITY(Pluto Journals, 2015) Karakoc, Julide; Dogruel, FulyaTurkey's changing policy toward Syria since the start of the Syrian uprisings in March 2011 has had major cultural, economic, social, and political implications for the people of the city of Hatay, which is located on the Turkey-Syria border and is home to people of diverse ethnicities and religions. This article explores how the problematic relations between Syria and Turkey following the uprisings in Syria have shaped perceptions of human security, examining in particular the impact of the discourse used and the policies followed by Turkey during the civil war in Syria on the security perceptions of the people of Hatay. It is suggested that Turkey's policy toward Syria and the resulting social, economic, and political repercussions for Hatay have fueled perceptions of insecurity for both Syrian refugees and the residents of the city.Öğe BSA adsorption onto commercial activated carbon modified by microwave assisted chemical activation(Bulgarian Acad Science, 2016) Taskin, M. B.; Ozbek, S.; Demirhan, E.; Ozbek, B.In the study, effects of pH and temperature on the equilibrium and the kinetics of bovine serum albumin (BSA) adsorption onto commercial and modified activated carbon were investigated. Activated carbon was modified firstly by treatment with Na2CO3, secondly thermally treated by microwave technique, and finally subjected to treatment with HCl. The modified activated carbon samples were characterized by Fourier Transform Infrared (FTIR) and BET analyses. The results indicated that it was possible to increase the surface area of the commercial activated carbon (CAC) after the modification process (MAC) with an enhancement percentage of 59%, compared to initial untreated CAC sample. The adsorption capacities decreased at pH values lower and higher than the isoelectric point value; and increased with increasing temperature for both activated carbon samples. Moreover, adsorption isotherm and kinetic data were well explained by the Langmuir isotherm and pseudo-second order kinetic models, respectively.Öğe Virtual Reality Remote Access Laboratory for Teaching Programmable Logic Controller Topics(Tempus Publications, 2020) Yerden, Aytac Ugur; Akkus, NihatThis study is concerned with improving the effectiveness and quality of technical education through the use of virtual reality technology. To do so, we have examined the effects of an application of a Virtual Reality-Supported Remote Access Laboratory (VRRALAB) system we developed using remote access and virtual reality technologies on students' learning experience. The advantage of such a remote access laboratory is that use of equipment that requires experience, such as working under high voltage, can be hazardous to novice users, whereas interactively using a real device from a virtual reality-supported remote access laboratory environment comes with no such risk. We have used an experimental design with 74 associate degree mechatronics program second class students who were divided into the control and experiment groups. They were enrolled on the same Programmable Logic Controller (PLC) course using the applications prepared for VRRALAB design. The experimental group was given a 4-hour training session using the basic subjects of a PLC lesson with the VRRALAB application with a traditional method, whilst the control group was taught only in conventional fashion. Both the control and experiment groups were assessed using the same exam questions. It was found that students who studied with VRRALAB were more successful than those who did not. Satisfaction levels among students using VRRALAB were also found to be high when measured by a questionnaire survey. The results indicate that remote access laboratories using virtual reality are likely to increase the quality of learning and satisfaction levels.
