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      • Diabetes is an Important Risk Factor for Metastasis in Non-Muscle-Invasive Bladder Cancer

        Ozer,,Kutan,Horsanali,,Mustafa,Ozan,Gorgel,,Sacit,Nuri,Ozbek,,Emin Asian Pacific Organization for Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.1

        Background: Epidemiological evidence indicates that individuals with diabetes mellitus (DM) may have a modestly increased risk of bladder cancer. In the present study, we aimed to show any association between DM and risk of metastasis in patients with non-muscle-invasive bladder cancer (NMIBC). Materials and Methods: We retrospectively analyzed 698 patients between January 2007 and December 2014 who were diagnosed with and underwent transurethral resection of bladder tumors (TUR-BT). Comparisons of means was conducted by independent samples t test, and relations between categorical variables were investigated by non-parametric chi-square test. A p value of 0.05 was accepted as statistically significant in comparisons. Results: We analyzed 418 patients with non muscle invasive bladder cancer. 123 of whom were diabetic and 295 non-diabetic. In diabetic patients, 13 were N1 stage and 11 M1 stage. When compared with non diabetic patients that was statistically significant (p<0.001). TNM stages were more advanced in diabetic patients (p<0.001), but concurrent CIS (p=0.1) and squamous metaplasia did not significantly differ between diabetic and non-diabetic cases (p=1). Conclusions: Diabetic patients with non-muscle-invasive bladder cancer may suffer metastases earlier than expected although they are non invasive. Therefore such patients must be followed-up carefully and early cystectomy decision may be necessary. Further prospective studies with more patients are needed to confirm these findings.

      • KCI등재SCOPUS

        Method for the Rapid Evaluation of Vehicle Mobility on Unpaved Terrain

        Ozer,Cinicioglu,Caglar,Cagbayir 대한토목학회 2012 KSCE JOURNAL OF CIVIL ENGINEERING Vol.16 No.5

        In cases where the mobilization of vehicle convoys in off-road conditions are considered, the mechanism of soil-vehicle interaction emerges as the key parameter controlling the travel time along the chosen route. Therefore, this paper proposes a new simplistic method that would allow the rapid evaluation of vehicle mobility in off-road conditions based on soil topography and vehicle characteristics. This method considers the limit equilibrium of soil under the loading conditions imposed by an accelerating vehicle and by natural terrain geometry. The influence of surface topography on soil's stress state is considered by modifying the dynamic fluidization theory. In this paper it is proven that the underlying assumptions of the fluidization theory are very well suited to define the nature of stress rotations in sloping ground and the resulting geometry of bearing capacity failure surfaces. Additionally, in order to consider the inertial effects and the effects of shear transfer between the vehicle and the soil, a Coulomb-type mechanism is adopted.

      • KCI등재후보

        Influence of Crown Margin Design on the Stress Distribution in Maxillary Canine Restored by All-Ceramic Crown: A Finite Element Analysis

        Ozer,,Zafer,Kurtoglu,,Cem,Mamedov,,Amirullah,M.,Ozbay,,Ekmel Korean Academy of Dental Science 2015 Journal of korean dental science Vol.8 No.1

        Purpose: To investigate the influence of crown margin design on the stress distribution and to localize critical sites in maxillary canine under functional loading by using three dimensional finite element analysis. Materials and Methods: The bite force of 100 N, 150 N, and 200 N was applied with an angulation of $45^{\circ}$ to the longitudinal axis of tooth. Six models were restored with IPS e.max (Ivoclar Vivadent, Schaan, Liechtenstein) with a different margin design. With lingual ledge and various thicknesses, three different core ceramics were designed in each model. Result: In the core ceramic, the maximum tensile stresses were found at the labiocervical region. In the veneering ceramic the maximum tensile stresses were found at the area where the force was applied in all models. Conclusion: Shoulder and chamfer margin types are acceptable for all-ceramic rehabilitations. A ledge on the core ceramic at cervical region may affect the strength of all-ceramic crowns.

      • SCOPUSSCIEKCI등재

        Alveolar ridge expansion-assisted orthodontic space closure in the mandibular posterior region

        Ozer,,Mete,Akdeniz,,Berat,Serdar,Sumer,,Mahmut The Korean Association Of Orthodontists 2013 대한치과교정학회지 Vol.43 No.6

        Orthodontic closure of old, edentulous spaces in the mandibular posterior region is a major challenge. In this report, we describe a method of orthodontic closure of edentulous spaces in the mandibular posterior region accelerated by piezoelectric decortication and alveolar ridge expansion. Combined piezosurgical and orthodontic treatments were used to close 14- and 15-mm-wide spaces in the mandibular left and right posterior areas, respectively, of a female patient, aged 18 years and 9 months, diagnosed with skeletal Class III malocclusion, hypodontia, and polydiastemas. After the piezoelectric decortication, segmental and full-arch mechanics were applied in the orthodontic phase. Despite some extent of root resorption and anchorage loss, the edentulous spaces were closed, and adequate function and esthetics were regained without further restorative treatment. Alveolar ridge expansion-assisted orthodontic space closure seems to be an effective and relatively less-invasive treatment alternative for edentulous spaces in the mandibular posterior region.

      • Tungsten/Copper Functionally Graded Materials : Possible Applications and Processing through the Powder Metallurgy Route

        Ozer,O.,Missiaen,J.M.,Pascal,C.,Lay,S.,Chaix,J.M.,Mitteau,R. 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1

        Processing of W-Cu graded materials from attritor-milled W-CuO mixtures is described. The powder reduction steps are investigated by TG and XRD analyses and by microstructural observations (SEM, TEM). Sintering of reduced powder with different compositions is analysed by dilatometry. Sintering behaviour of the graded component processed by co-compaction of a 10/20/30wt%Cu multi-layer material is briefly discussed. Liquid Cu migration is observed and smooths the composition gradient. Perspectives to control this migration are discussed.

      • SCIESCOPUS

        A New Fe (III)-Selective Membrane Electrode Based on Fe (II) Phthalocyanine

        Ozer,,Tugba,Isildak,,Ibrahim The Korean Electrochemical Society 2019 Journal of electrochemical science and technology Vol.10 No.3

        A new miniaturized all solid-state contact Fe (III)-selective PVC membrane electrode based on Fe (II) phthalocyanine as a neutral carrier was described. The effects of the membrane composition and foreign ions on the electrode performance was investigated. The best performance was obtained with a membrane containing 32% poly (vinyl chloride), 64% dioctylsebacate, 3% Fe (II) phthalocyanine, and 1% potassium tetrakis (p-chlorophenyl) borate. The electrode showed near Nernstian response of $26.04{\pm}0.95mV/decade$ over the wide linear concentration range $1.0{\times}10^{-6}$ to $1.0{\times}10^{-1}M$, and a very low limit of detection $1.8{\pm}0.5{\times}10^{-7}M$. The potentiometric response of the developed electrode was independent at pH 3.5-5.7. The lifetime of the electrode was approximately 3 months and the response time was very short (< 7 s). It exhibited excellent selectivity towards Fe (III) over various cations. The miniaturized all solid-state contact Fe (III)-selective membrane electrode was successfully applied as an indicator electrode for the potentiometric titration of $1.0{\times}10^{-3}M$ Fe (III) ions with a $1.0{\times}10^{-2}M$ EDTA and the direct determination of Fe (III) ions in real water samples.

      • KCI등재후보

        Influence of Crown Margin Design on the Stress Distribution in Maxillary Canine Restored by All-Ceramic Crown

        Zafer,Ozer,Cem,Kurtoglu,Amirullah,M.,Mamedov,Ekmel,Ozbay 대한치의학회 2015 Journal of korean dental science Vol.8 No.1

        Purpose: To investigate the influence of crown margin design on the stress distribution and to localize critical sites in maxillary canine under functional loading by using three dimensional finite element analysis. Materials and Methods: The bite force of 100 N, 150 N, and 200 N was applied with an angulation of 45° to the longitudinal axis of tooth. Six models were restored with IPS e.max (Ivoclar Vivadent, Schaan, Liechtenstein) with a different margin design. With lingual ledge and various thicknesses, three different core ceramics were designed in each model. Result: In the core ceramic, the maximum tensile stresses were found at the labiocervical region. In the veneering ceramic the maximum tensile stresses were found at the area where the force was applied in all models. Conclusion: Shoulder and chamfer margin types are acceptable for all-ceramic rehabilitations. A ledge on the core ceramic at cervical region may affect the strength of all-ceramic crowns.

      • Robotic Metal Spinning- Experiments with Cascaded Position-Velocity Control with an add-on Vibration Suppressor for Enhanced Trajectory Tracking

        Abdullah,Ozer,Hirohiko,Arai 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

        In order to increase the adaptability of industrial robots to broader application areas, it is required toimprove the fundamental control strategies with supplementary methods to a more sophisticated level. Machiningprocesses are one of the areas that need more advanced and robust control approaches due to the steady forcerequirements and inevitable feedback between the task forces and dynamics of the system. With this research, it isaimed to introduce industrial robots, as a highly versatile automation tool, to the metal spinning process and expand its application areas. An industrial robot has been used to implement robotic metal spinning process and to conductexperiments. Preliminary experimental results for an enhanced trajectory tracking algorithms are presented in this paper to provide a foundation for the expansion of robotic applications. The results show that it is feasible to performthe metal spinning process by using an industrial robot with cascaded trajectory tracking algorithms. Furtherimprovements can be observed with the proposed cascaded control technique together with an add-on vibration suppressor, in an attempt to enhance the process and attenuate the robot's joint oscillations.

      • KCI등재

        A monographic research on the Assyrian culinary culture in Turkey

        Cagla,Ozer 한국식품연구원 2019 Journal of Ethnic Foods Vol.6 No.-

        Assyrians are the oldest civilization of Mesopotamia and have a history of 5500–6000 years. They are known as the first civilization in history, founded in Antakya by Mor Petrus in 37–43 AD and briefly announcing Christianity to the whole Middle East. Today, it is estimated that there are 12 and a half million Assyrians in the world and 45,000 Assyrians in Turkey. Most of them live in different regions of Eastern Anatolia, mostly in Istanbul. The Ottoman Empire served as home to countless cultures and religions with its 500-year history, and this cultural wealth made a positive impact on the culinary culture, creating a unique kitchen. Various sources argue that the cultures of Assyrians, especially in the regions where Assyrians lived, constituted Assyrian culinary cultures with a dense population. In this study, the history of the Assyrian, the regions they lived extensively in the world and Turkey, and the beliefs and practices in birth, marriage, death, feast, and holy days have been examined in terms of gastronomic culture.

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