Browsing by Author "Basaran, S"
Now showing 1 - 7 of 7
Results Per Page
Sort Options
Item Design and Finite Element Analysis of a 6/4 Pole Multi-Layer Fully Pitched Switched Reluctance Motor to Reduce Torque RippleSahin, C; Basaran, S-In this study, the design and analysis of multi-layer fully pitched winding switched reluctance motor (MFP-SRM) for general use (submersible pump, electric vehicles, etc.) have been performed. It is seen that the multi-layer switched reluctance motor (SRM) has higher output power when compared to the single-layer SRM. In multi-layer SRM, the motors in the layers are electromagnetically independent of each other although they are identically the same motors with the same characteristics in terms of performance and geometry. Each layer of the MFP-SRM which is designed in this study consists of a 6/4 pole fully pitched SRM (FP-SRM) and these motors are magnetically independent of each other. In the MFP-SRM, which is designed as a double layer, there is a 15 degrees phase difference between the rotor position angles and torque profile curves of each layer. With the phase difference that changes depending on the number of layers, each layer contributes to the total torque production of the profile, ensuring a smooth profile. According to the results of the 3D FEM analysis, it is seen that the proposed multi-layer motor structure has high starting torque and low torque ripple properties. In the analysis carried out in the range of 3-15 Amperes, the torque ripple of the traditional FP-SRM varies between 31.99% and 38.19%, while the torque ripple of the proposed MFP-SRM only varies between 3.23% and 7.11%.Item Comparative study on the thermal and tribological properties of PA12 and PA11 for coating applicationsBasaran, S; Türkmen, I; Yagci, T; Kanbur, K; Bastürk, SBIn this study, the performance and potential applicability of polyamide-12 (PA12) as an alternative to polyamide-11 (PA11), which is currently used in the coating processes of sliding tools present in cardan shafts, was investigated. The advantages of PA12 powder instead of PA11 in cardan shafts' coating include ease of supply and cost-effectiveness, while still achieving similar performance. Therefore, PA12 is a more economical choice for coating applications. The PA11 and PA12 neat polymers were characterized via differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). Based on the analyses, PA12 demonstrated substantial advantages over PA11. It showed a 16 degrees C improvement in decomposition temperature and a 50% increase in crystallinity, enhancing stability under operational conditions, whereas PA11 exhibited approximately 6-7% higher values in crystallization and melting temperatures. The wettability behavior of the steel substrates coated with those polyamides was measured via contact angle analysis. Wear properties and morphologies of coatings were examined using a ball-on disc test and scanning electron microscopy, respectively and comparatively. Furthermore, PA12 typically displays 30% lower wear rates and similar deformation patterns in tests, thereby presenting itself as a cost-effective and widely accessible option for coating applications in comparison to PA11.Item Assessment of the Relationship Between Vitamin D Level and Non-specific Musculoskeletal System Pain: A Multicenter Retrospective Study (Stroke Study Group)Karahan, AY; Hüner, B; Kuran, B; Sezer, N; Çelik, C; Salbas, E; Ordahan, B; Karaca, G; Yilmaz, H; Gündüz, B; Erhan, B; Bugdayci, DS; Bardak, A; Paker, N; Külcü, DG; Yaliman, A; Atalay, NS; Yildiz, N; Icagasioglu, A; Basaran, S; Tikiz, C; Kaydok, E; Kaya, T; Karatas, GK; Baygutalp, F; Celebi, G; Yilmaz, F; Önes, K; Akkus, S; Yumusakhuylu, Y; Durlanik, G; Dogu, B; Öncü, J; Sari, A; Özkan, FÜ; Kaysin, MY; Taskiran, ÖÖ; Erol, AM; Eskiyurt, NObjective: In this study, it was aimed to evaluate the relationship between vitamin D level and pain severity, localization and duration in patients with non-specific musculoskeletal pain. Materials and Methods: Patients who applied to physical medicine and rehabilitation outpatient clinics due to non-specific muscle pain in 19 centers in Turkey were retrospectively screened. Three thousand four hundred fourpatients were included in the study, whose pain level was determined by visual analog scale (VAS) and the painful region, duration of pain and vitamin D level were reached. D group was found to be D deficient (group 1) when 25 (OH) D level was 20 ng/mL or less and group D 2 (vitamin D deficiency) was higher than 30 ng/mL (group 3). The groups were compared in terms of pain duration, localization and severity. In addition, the correlations of pain localization, severity and duration with vitamin D levels were examined. Results: D vitamin deficiency was detected in 2202 (70.9%) of 3 thousand four hundred and four registered patients, and it was found that vitamin D deficiency in 516 (16.6%) and normal vitamin D in 386 (12.4%). The groups were similar in terms of age, body mass index, income level, duration of complaint, education level, family type and working status (p>0.05). There was no statistically significant difference between groups in terms of VAS, pain localization and duration scores (p>0.05). Conclusion: Our study shows that vitamin D deficiency in patients with nonspecific musculoskeletal pain is not associated with the severity and duration of pain.Item Demographic and clinical characteristics of inpatient stroke patients in TurkeyKülcü, DG; Kuran, B; Karahan, AY; Özgirgin, N; Basaran, S; Yaliman, A; Savas, S; Tikiz, C; Aktas, I; Bardak, A; Tuncer, T; Yilmaz, F; Erhan, B; Sirzai, H; Çelik, B; Durlanik, G; Dogu, B; Öncü, J; Hüner, B; Öztürk, G; Eskiyurt, N; Akpinar, FM; Özkan, FU; Paker, N; Bugdayci, DS; Gündüz, B; Satir, Ö; Atalay, NS; Yildiz, N; Altindag, Ö; Demir, SE; Kaya, E; Uçar, D; Sari, A; Karatas, GK; Taskiran, ÖÖObjectives: This study aims to assess the stroke rehabilitation facilities provided by university hospitals (UHs) and training and research hospitals (TRHs) and to evaluate the geographical disparities in stroke rehabilitation. Patients and methods: Between April 2013 and April 2014 a total of 1,529 stroke patients (817 males, 712 females; mean age: 61.7 +/- 14.0 years; range, 12 to 91 years) who were admitted to the physical medicine and rehabilitation clinics in 20 tertiary care centers were retrospectively analyzed. Demographic, regional and clinical characteristics, details of rehabilitation period, functional status, and complications were collected. Results: The median duration of stroke was five (range, 1 to 360) months. The ratio of the patients treated in the TRH in the Marmara region was 77%, but only 25% of the patients were living in the Marmara region. Duration of hospitalization was longer in the TRHs with a median of 28 days compared to those of UHs (median: 22 days) (p<0.0001). More than half of the patients (55%) were rehabilitated in the Marmara region. Time after stroke was the highest in the Southeast region with a median of 12 (range, 1 to 230) months and the lowest in the Aegean region with a median of four (range, 1 to 84) months. Conclusion: This study provides an insight into the situation of stroke rehabilitation settings and characteristics of stroke patients in Turkey. A standard method of patient evaluation and a registry system may provide data about the efficacy of stroke rehabilitation and may help to focus on the problems that hinder a better outcome.Item Assessment of the Relationship Between Vitamin D Level and Non-specific Musculoskeletal System Pain: A Multicenter Retrospective Study (Stroke Study Group) (vol 23, pg 61, 2017)Karahan, AY; Hüner, B; Kuran, B; Sezer, N; Çelik, C; Salbas, E; Ordahan, B; Karaca, G; Yilmaz, H; Gündüz, B; Erhan, B; Bugdayci, DS; Bardak, A; Paker, N; Külcü, DG; Yaliman, A; Atalay, NS; Yildiz, N; Içagasioglu, A; Basaran, S; Tikiz, C; Kaydok, E; Kaya, T; Karatas, GK; Baygutalp, F; Çelebi, G; Yilmaz, F; Önes, K; Akkus, S; Yumusakhuylu, Y; Durlanik, G; Dogu, B; Öncü, J; Sari, A; Özkan, FU; Kaysin, MY; Taskiran, OO; Erol, AM; Eskiyurt, NItem THE FREQUENCY AND ASSOCIATION OF KNEE, HIP, HAND AND SPINE OSTEOARTHRITIS IN TURKISH POPULATION: A PRELIMINARY RE PORT OF MULTICENTER LONGITUDINAL STUDYTuncer, T; Ugur, S; Nur, H; Kacar, C; Akarimak, U; Altan, L; Ayhan, F; Bal, A; Basaran, S; Bilgilisoy, M; Bozbas, G; Cerrahoglu, L; Cevik, R; Coskun, N; Dagli, Z; Durmaz, B; Duruoz, T; Dulgeroglu, D; Gurer, G; Gursoy, S; Hepguler, S; Hizmetli, S; Kaplanoglu, E; Kaya, T; Kocabas, H; Kuran, B; Melikoglu, M; Nas, K; Oncu, J; Ozcakir, S; Ozdolap, S; Saridogan, M; Sarikaya, S; Sindel, D; Sahin, O; Sendur, OF; Tikiz, C; Ugurlu, H; Yilmaz, FItem Stroke risk in patients with musculoskeletal pain: A multicenter prospective Turkish trialKuran, B; Kulcu, DG; Huner, B; Karahan, A; Yaliman, A; Celik, B; Içagasioglu, A; Celik, C; Tikiz, C; Basaran, S