Ziya Arslan | Kristiania University College (original) (raw)

Papers by Ziya Arslan

Research Square (Research Square), Apr 8, 2024

Applied Bionics and Biomechanics

Finite element (FE) models have frequently been used to analyze spine biomechanics. Material para... more Finite element (FE) models have frequently been used to analyze spine biomechanics. Material parameters assigned to FE spine models are generally uncertain, and their effect on the characterization of the spinal components is not clear. In this study, we aimed to analyze the effect of model parameters on the range of motion, stress, and strain responses of a FE cervical spine model. To do so, we created a computed tomography-based FE model that consisted of C2-C3 vertebrae, intervertebral disc, facet joints, and ligaments. A total of 32 FE analyses were carried out for two different elastic modulus equations and four different bone layer numbers under four different loading conditions. We evaluated the effects of elastic modulus equations and layer number on the biomechanical behavior of the FE spine model by taking the range of angular motion, stress, and strain responses into account. We found that the angular motions of the one- and two-layer models had a greater variation than t...

Ankara Üniversitesi Beden Eğitimi ve Spor Yüksekokulu SPORMETRE Beden Eğitimi ve Spor Bilimleri Dergisi

The aim of this study was to develop a scale to determine the competencies of physical education ... more The aim of this study was to develop a scale to determine the competencies of physical education and sports teachers regarding the education of students with special needs and to carry out the reliability and validity studies of the developed scale. In this study, as a method, an item pool was created by taking into account the existing scale development stages in the literature, expert opinions were obtained, content validity was ensured, a trial scale was created, data were collected from the first sample group, exploratory factor analysis (EFA) was performed, and after the scale was rearranged, the second sample group was selected, data were collected and confirmatory factor analyzes (CFA) were performed. Physical education and sports teachers working in different parts of Turkey in the 2020-2021 academic year were included in the research. During the research process, two different study groups were included. Data were collected from 165 (81 women, 89 men) physical education and...

European Journal of Science and Technology, 2022

Copyright © 2012 Yunus Ziya Arslan et al. This is an open access article distributed under the Cr... more Copyright © 2012 Yunus Ziya Arslan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. In our previous study, we have demonstrated that analyzing the skin impedances measured along the key points of the dermatomes might be a useful supplementary technique to enhance the diagnosis of spinal cord injury (SCI), especially for unconscious and noncooperative patients. Initially, in order to distinguish between the skin impedances of control group and patients, artificial neural networks (ANNs) were used as the main data classification approach. However, in the present study, we have proposed two more data classification approaches, that is, support vector machine (SVM) and hierarchical cluster tree analysis (HCTA), which improved the classification rate and also the overall performance. A comparison of the performance of...

3D Printing in Biomedical Engineering, 2020

Human hand prosthetics imply a great challenge to researchers to help regaining the lost motor fu... more Human hand prosthetics imply a great challenge to researchers to help regaining the lost motor functions for amputated people. A relatively high amount of labor and budget are required to reach the ordinary prosthetics for amputees. Improvement of assistive technologies has provided to design and manufacture more functional hand prosthetics. Novel tools employed in assistive technology including 3-dimensional printers and user-friendly electronics complementary devices have made a great contribution to prosthetics area with fast and cost effective solutions. Although a significant development of technical facilities has been occurred, prosthetic hands with high functionality could not gain wide currency since the manufacturing and design processes require more educated engineers and biomechanicsts. Introducing the design and manufacturing steps of prosthetics for educational purposes in engineering and life sciences could be very effective in order to ease accessing the more functio...

Bu calismanin amaci, sinif ogretmenlerinin, beden egitimi ders programi ve ders uygulamalarina il... more Bu calismanin amaci, sinif ogretmenlerinin, beden egitimi ders programi ve ders uygulamalarina iliskin goruslerini saptamak ve bu gorusler arasinda cinsiyete, hizmet yilina ve mezun olduklari bolume gore anlamli bir fark olup olmadigini tespit etmektir. Calismaya Denizli ili merkez ilcedeki ilkogretim okullarinda gorev yapan 425 sinif ogretmeni katilmistir. Calismada veri toplama araci olarak, calisma oncesi Turkce’ye uyarlanan “Okul Saglik Indeksi-Beden Egitimi Olcegi” ve “Kisisel Bilgi Formu” kullanilmistir. Yapilan guvenirlik calismasinda, olcege iliskin Cronbach Alfa guvenirlik katsayisi 0.82 olarak bulunmustur. Veriler tanimlayici istatistik (frekans- yuzde), T-testi, Tek Yonlu Varyans Analizi ve Tukey testi kullanilarak cozumlenmistir. Elde edilen olcek puanlarindan hareketle, kadin ( X = 20.6 ±4.9) ve erkek ( X = 20.0 ±5.0) sinif ogretmenlerinin, beden egitimi ders programina yonelik uygulamalarina iliskin goruslerinin olumsuz oldugu soylenebilir. Olcek puanlarinda, hizmet yi...

Journal of Medical and Biological Engineering, 2014

Sagittal split osteotomy (SSO) is a maxillofacial surgery procedure that is used to correct mandi... more Sagittal split osteotomy (SSO) is a maxillofacial surgery procedure that is used to correct mandibular prognathism, retrusion, or asymmetry. During an SSO, the use of sharp rotary tools for the osteotomy can induce complications, especially during the osteotomy of the medial side of the mandibular ramus. In this study, to decrease SSO complications, a computer-assisted, patient-specific sagittal split osteotomy guide and soft tissue retractor is developed. Computed tomography (CT) images of a human cadaveric mandible were digitally converted into a three-dimensional (3D) model. Then, a case-specific 3D model of the proposed device was designed for the surface of a cadaveric mandible, with the osteotomy line and geometric dimensions of the mandible both taken into consideration. The created 3D model was used to manufacture the device using the metal laser sintering method. Finally, an SSO with the device was performed on the cadaveric mandible used to acquire the CT data. The propose...

World Academy of Science, Engineering and Technology, International Journal of Biomedical and Biological Engineering, 2015

Encyclopedia of Information Science and Technology, Fourth Edition, 2018

Life, 2021

Background: Patellar tendon advancement (PTA) is performed for the treatment of crouch gait in pa... more Background: Patellar tendon advancement (PTA) is performed for the treatment of crouch gait in patients with cerebral palsy (CP). In this study, we aimed to determine the influence of PTA in the context of single-event multilevel surgery (SEMLS) on knee joint moment and muscle forces through musculoskeletal modeling; Methods: Gait data of children with CP and crouch gait were retrospectively analyzed. Patients were included if they had a SEMLS with a PTA (PTA group, n = 18) and a SEMLS without a PTA (NoPTA group, n = 18). A musculoskeletal model was used to calculate the pre- and postoperative knee joint moments and muscle forces; Results: Knee extensor moment increased in the PTA group postoperatively (p = 0.016), but there was no statistically significant change in the NoPTA group (p > 0.05). The quadriceps muscle forces increased for the PTA group (p = 0.034), while there was no difference in the NoPTA group (p > 0.05). The hamstring muscle forces increased in the PTA group...

Acta Ortopédica Brasileira, 2018

Objective: To assess the histopathologic and biomechanical effects of hyaluronic acid (HA) and hi... more Objective: To assess the histopathologic and biomechanical effects of hyaluronic acid (HA) and high-dose vitamin C (VC) on rat Achilles tendon healing. Methods: Forty-eight Sprague-Dawley rats were randomized to HA and VC and control groups with equal numbers. Each group was further divided into two subgroups to be sacrificed on Day 15 (n=8) and Day 30 (n=8). The Achilles tendons were cut and repaired. While the control rats remained untreated, HA and VC were administered after repair. The repaired tendons were removed for biomechanical and histopathologic analyses. In the biomechanical tests, the tendons were stretched to failure and maximum forces were measured. For histopathologic examination, the specimens were interpreted semiquantitatively using Movin’s grading scale and Bonar scores. Results: The highest mean forces were obtained in the HA group on Day 15 and in the VC group on Day 30, with a significant difference between HA and VC on Day 15 between control and VC on Day 30 ...

Acta Ortopédica Brasileira, 2020

Objective: We aimed to investigate the change in bone mineral density (BMD) in the first postoper... more Objective: We aimed to investigate the change in bone mineral density (BMD) in the first postoperative year in patients that underwent total knee arthroplasty (TKA) due to primary osteoarthritis of the knee. Methods: Preoperative and first postoperative year dual-energy X-ray absorptiometry measurements of 76 patients with knee osteoarthritis, who undergone surgery between 2016 and 2018 due to the recommendation for TKA, were statistically evaluated in the study. Results: Of the 19 patients with a normal BMD in the preoperative period, 73.7% (n = 14) continued to have a normal BMD in the postoperative period. Of the 34 patients with a low BMD (osteopenia) in the preoperative period, 91.2% (n = 31) did not show any change, whereas osteoporosis was observed in two patients (5.9%) in the postoperative period. Of the 23 patients with osteoporosis in the preoperative period, 95.7% (n = 22) did not show any change, whereas osteopenia was observed in one patient (4.3%) in the postoperative...