Early Diagnosis Behavior in Turkish Women with and without a Family History of Cervical Cancer

Gunaydin, Cansu,Gencturk, Nuran Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.2

Background: This study was planned as comparative and descriptive in order to measure and evaluate the knowledge and attitudes regarding early diagnosis of women with and without a family history of cervical cancer. Materials and Methods: The study sample consisted of the relatives of female patients (N=253) who were admitted to Istanbul University of Medicine. Women with a family history of cervical cancer formed the case group, while those without family history of cervical cancer constituted the control group. Two distinct data collection tools, a questionnaire and the Miller Behavioral Style Scale (MBSS), were used in order to obtain data for evaluation with SPSS for Windows 20.0 statistics package program. Results: It was found that 61.0% of the case group with family history of cervical cancer and 19.0% of the control group without family history of cervical cancer were using early diagnostic methods. Thus the presence of an individual with cervical cancer in the family affected the attitudes towards early diagnosis. It was further found that the level of knowledge on cervical cancer and PAP smear test was higher in the case group, which was more sensitive with regard to being informed about cervical cancer as compared to general society. However, the average MBSS scores were not significantly different compared to the control group. Conclusions: It was noted that, women participating this study knowledgeable, but this did not necessarily transform into better behavior.

Construction stage analysis of fatih sultan mehmet suspension bridge

Gunaydin, Murat,Adanur, Suleyman,Altunisik, Ahmet Can,Sevim, Baris Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.42 No.4

In this study, it is aim to perform the construction stage analysis of suspension bridges using time dependent material properties. Fatih Sultan Mehmet Suspension Bridge connecting the Europe and Asia in Istanbul is selected as an example. Finite element models of the bridge are modelled using SAP2000 program considering project drawing. Geometric nonlinearities are taken into consideration in the analysis using P-Delta large displacement criterion. The time dependent material strength variations and geometric variations are included in the analysis. Because of the fact that the bridge has steel structural system, only prestressing steel relaxation is considered as time dependent material properties. The structural behaviour of the bridge at different construction stages has been examined. Two different finite element analyses with and without construction stages are carried out and results are compared with each other. As analyses result, variation of the displacement and internal forces such as bending moment, axial forces and shear forces for bridge deck and towers are given with detail. It is seen that construction stage analysis has remarkable effect on the structural behaviour of the bridge.

Static and dynamic responses of Halgavor Footbridge using steel and FRP materials

M. Gunaydin,S. Adanur,A.C. Altunisik,B. Sevim 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.18 No.1

In recent years, the use of fiber reinforced polymer composites has increased because of their unique features. They have been used widely in the aircraft and space industries, medical and sporting goods and automotive industries. Thanks to their beneficial and various advantages over traditional materials such as high strength, high rigidity, low weight, corrosion resistance, low maintenance cost, aesthetic appearance and easy demountable or moveable construction. In this paper, it is aimed to determine and compare the geometrically nonlinear static and dynamic analysis results of footbridges using steel and glass fiber reinforced polymer composite (GFRP) materials. For this purpose, Halgavor suspension footbridge is selected as numerical examples. The analyses are performed using three identical footbridges, first constructed from steel, second built only with GFRP material and third made of steel- GFRP material, under static and dynamic loadings using finite element method. In the finite element modeling and analyses, SAP2000 program is used. Geometric nonlinearities are taken into consideration in the analysis using P-Delta criterion. The numerical results have indicated that the responses of the three bridges are different and that the response values obtained for the GFRP composite bridge are quite less compared to the steel bridge. It is understood that GFRP material is more useful than the steel for the footbridges.

In situ dynamic investigation on the historic “İskenderpaşa” masonry mosque with non-destructive testing

Murat Gunaydin 국제구조공학회 2020 Smart Structures and Systems, An International Jou Vol.26 No.1

Turkey is a transcontinental country located partly in Asia and partly in Europe, and hosted by diverse civilizations including Hittite, Urartu, Lydia, Phrygia, Pontius, Byzantine, Seljuk's and Ottomans. At various times, these built many historic monuments representing the most significant characteristics of their civilizations. Today, these monuments contribute enormously to the esthetic beauty of environment and important to many cities of Turkey in attracting tourism. The survival of these monuments depends on the investigation of structural behavior and implementation of needed repairing and/or strengthening applications. Hence, many countries have made deeper investigations and regulations to assess their monuments' structural behavior. This paper presents the dynamic behavior investigation of a monumental masonry mosque, the "İskenderpaşa Mosque" in Trabzon (Turkey), by performing an experimental examination with non-destructive testing. The dynamic behavior investigation was carried out by determining the dynamic characteristic called as natural frequencies, mode shapes and damping ratios. The experimental dynamic characteristics were extracted by Operational Modal Analysis (OMA). In addition, Finite Element (FE) model of masonry mosque was constructed in ANSYS software and the numerical dynamic characteristics such as natural frequencies and mode shapes were also obtained and compared to experimental ones. The paper aims at presenting the non-destructive testing procedure of a masonry mosque as well as the comparison of experimental and numerical dynamic characteristics obtained from the mosque.

The Preparation of Transparent Organic Field Effect Transistor Using a Novel EDOT Functional Styrene Copolymer Insulator With a PEDOT:PSS Gate Electrode

Okan Gunaydin,Ahmet Demir,Gülçin Ersöz Demir,İbrahim Yücedağ,Bünyemin Çoşut 한국고분자학회 2018 Macromolecular Research Vol.26 No.2

In this study, we have purposed to combine both polystyrene (PS) and 3,4-ethylenedioxythiophene (EDOT) groups as a gate dielectric and to fabricate a transparent organic field effect transistor (OFET) device with polymeric gate electrode using this novel organic dielectric material. The focus point of this work is to obtain a transparent OFET and to minimize the interface states between gate insulator and gate electrode. Firstly, we have synthesized EDOT functional polystyrene (PS-EDOT) copolymer as gate insulator via “click” chemistry between azide-functional styrene copolymer and propargyl-functionalized EDOT. We used the poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) conductive polymer mixture as a suitable alternative gate electrode instead of inorganic contacts, which is a new topic in the organic electronics. The contact resistance value was measured as 1/600 (S/cm)-1. At the end of the process transparent OFETs with different channel length were fabricated using spin coating method by which poly(3-hexylthiophene) (P3HT), novel PS-EDOT copolymer insulator and PEDOT:PSS were coated on prepatterned OFET substrate. Electrical characterizations of OFET devices were held in total darkness and in air ambient in order to achieve output and transfer current-voltage (I-V) characteristics. The main parameters such as the threshold voltage (VTh), field effect mobility (μFET) and current on/off ratio (Ion/off) of the devices were extracted from capacitance-frequency (C-f) plot. It was found that fabricated PS-EDOT OFETs exhibit good device performances such as low VTh, remarkable mobility, and Ion/off values.

On the evaluation of critical lateral buckling loads of prismatic steel beams

R. Aydin,A. Gunaydin,N. Kirac 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.18 No.3

In this study, theoretical models and design procedures of the behavior of thin-walled simply supported steel beams with an open cross section under a large torsional effect are presented. I-sections were chosen as the cross section types. Firstly, the widely used differential equations for the lateral buckling for the pure bending moment effect in a beam element were adopted for the various moment distributions along the span of the beam. This solution was obtained for both mono-symmetric and bisymmetric sections. The buckling loads were then obtained by using the energy method. When using the energy method to solve the problem, it is possible to locate the load not only on the shear center but also at several points of the section depth. Buckling loads were obtained for six different load types. Results obtained for different load and cross section types were checked with ABAQUS software and compared with several standard rules.

Effects of the vertical component of ground motion on the seismic performance of Bhakra Gravity Dam

Sevim, Baris,Altunisik, Ahmet Can,Gunaydin, Murat Techno-Press 2021 Advances in concrete construction Vol.12 No.3

In this paper, the earthquake component effects on the seismic performance of Bhakra Gravity Dam in India are investigated. For the purpose, Bhakra Dam is modeled two-dimensionally considering dam-reservoir-foundation interaction. In the finite element modeling, dam and foundation are represented by PLANE182 elements in ANSYS with different material properties, and fluid is considered with FLUID29 elements. This type of element provides translation and pressure degrees of freedom. Linear time history analyses on the dam are performed by considering components of the 1991 Uttarkashi and 1999 Chamoli (NW Himalaya) Earthquakes in India. During the analyses firstly the horizontal component of earthquakes are applied to system and results are obtained, and then both of horizontal and vertical components are applied to the systems together. In the analyses, element matrices are computed using the Gauss numerical integration technique. The Newmark method is used in the solution of the equation of motions. Also, Rayleigh damping is considered. The seismic performance of Bhakra Dam is examined and presented by dynamic characteristics, displacements, principal stresses, and demand-capacity ratios. The results showed that the vertical components of the earthquake significantly affect the response of the dam. The results show that the vertical component with the horizontal component cause biggest tensile stresses compared to only the horizontal component for both earthquakes. However, displacement response is changed depending on the ground motion. As a conclusion of this study it can be said that the vertical component changes the structural response of the dam on both of the good and bad behaviors.

Cross-Cultural Adaptation, Validity, and Reliability Study of the Turkish Version of the Back Pain Functional Scale

Gokhan Maras,Shahed Sheidayi,Gokhan Yazici,Melek Volkan Yazici,Gurkan Gunaydin,Seyit Citaker 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.4

Study Design: Prospective study. Purpose: To investigate the cross-cultural adaptation, validity, and reliability of the Turkish version of the Back Pain Functional Scale (BPFS). Overview of Literature: Low back pain is a common disorder in the population that negatively affects the patient’s daily, professional, and social life. Self-report questionnaires are important to precisely evaluate back pain and making better and appropriate treatment decisions. Currently, there are several questionnaires for investigating mobility in patients with low back pain. Methods: We recruited 360 patients with chronic low back pain. For assessing the reliability of the scale, we performed test–retest and internal consistency analyses. Test–retest analysis was performed using intraclass correlation coefficient (ICC). Internal consistency was analyzed by calculating Cronbach’s alpha value. Construct validity of the questionnaire was evaluated by comparing total scores on the BPFS with those on Roland Morris Disability Questionnaire (RMDQ) and Oswestry Disability Index (ODI) using Pearson’s correlation coefficient analysis. Results: Cronbach’s alpha value was 0.910, indicating high internal consistency. The test–retest reliability was excellent (ICC, 0.958; 95% confidence interval, 0.710–0.908). No floor or ceiling effects were observed. Factor analysis indicated that the scale had a single-factor structure. Pearson correlation coefficient was −0.669 when BPFS was compared with RMDQ and −0.701 when compared with ODI. These values indicate a significant correlation of BPFS with RMDQ and ODI. Conclusions: These data indicate the validity and reliability of the Turkish version of the BPFS.

Adult Urological Soft Tissue Sarcomas: A Multicenter Study of the Anatolian Society of Medical Oncology (ASMO)

Unal, Olcun Umit,Oztop, Ilhan,Menekse, Serkan,Urakci, Zuhat,Bozkurt, Oktay,Ozcelik, Melike,Gunaydin, Yusuf,Yasar, Nurgul,Yazilitas, Dogan,Kodaz, Hilmi,Taskoylu, Burcu Yapar,Aksoy, Asude,Demirci, Umut Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.11

Objective: To analyze clinicopathological characteristics, prognostic factors and survival rates of the patients with urological soft tissue sarcomas treated and followed up in Turkey. Materials and Methods: For overall survival analyses the Kaplan-Meier method was used. From medical records, nine prognostic factors on overall survival were analysed. Results: For the 53 patients (34 males, 19 females) whose charts were reviewed, the median age was 53 (range 22 to 83) years. Most frequently renal location (n=30; 56.6%) was evident and leiomyosarcoma (n=20, 37.7%) was the most frequently encountered histological type. Median survival time of all patients was 40.3 (95% CI, 14.2-66.3) months. In univariate analysis, male gender, advanced age (${\geq}50years$), metastatic stage, unresectability, grade 3, renal location were determined as worse prognostic factors. In multivariate analysis, metastatic stage, unresectability and grade 3 were determined as indicators of worse prognosis. Conclusions: Urological soft tissue sarcomas are rarely seen tumours in adults. The most important factors in survival are surgical resection, stage of the tumour at onset, grade and location of the tumour, gender and age of the patients.

Extended Pelvic Lymph Node Dissection: Before or after Radical Cystectomy? A Multicenter Study of the Turkish Society of Urooncology

Haluk Ozen,Ozgur Ugurlu,Sumer Baltaci,Oztug Adsan,Guven Aslan,Cavit Can,Gurhan Gunaydin,Atilla Elhan,Yasar Beduk 대한비뇨의학회 2012 Investigative and Clinical Urology Vol.53 No.7

Purpose: We aimed to ascertain the effects of performing extended pelvic lymph node dissection (PLND) on the duration of surgery, morbidity, and the number of lymph nodes removed when the dissection was performed before or after radical cystectomy (RC). Materials and Methods: We used the database of our previous prospective multicenter study. A total of 118 patients underwent RC and extended PLND. Of the 118 patients, 48 (40.7%) underwent extended PLND before RC (group 1) and 70 (59.3%) underwent extended PLND after RC (group 2). The two groups were compared for extended PLND time, RC time, and total operation times, per operative morbidity, and the total numbers of lymph nodes removed. Results: Clinical and pathologic characteristics were comparable in the two groups (p>0.05). The mean RC time and mean total operation times were significantly shorter in group 1 than in group 2 (p<0.001). The mean number of lymph nodes removed was 27.31±10.36 in group 1 and 30.87±8.3 in group 2 (p=0.041). Only at the presacral region was the mean number of lymph nodes removed significantly fewer in group 1 than in group 2 (p=0.001). Intraoperative and postoperative complications and drain withdrawal time were similar in both groups (p=0.058, p=0.391, p=0.613, respectively). Conclusions: When extended PLND was performed before RC, the duration of RC and consequently the total duration of the operation were significantly shorter than when extended PLND was performed after RC. Practitioners may consider performing extended PLND before RC and rechecking the presacral area for additional lymph nodes after RC, particularly in elderly patients with high co-morbidity for whom the duration of surgery matters. Purpose: We aimed to ascertain the effects of performing extended pelvic lymph node dissection (PLND) on the duration of surgery, morbidity, and the number of lymph nodes removed when the dissection was performed before or after radical cystectomy (RC). Materials and Methods: We used the database of our previous prospective multicenter study. A total of 118 patients underwent RC and extended PLND. Of the 118 patients, 48 (40.7%) underwent extended PLND before RC (group 1) and 70 (59.3%) underwent extended PLND after RC (group 2). The two groups were compared for extended PLND time, RC time, and total operation times, per operative morbidity, and the total numbers of lymph nodes removed. Results: Clinical and pathologic characteristics were comparable in the two groups (p>0.05). The mean RC time and mean total operation times were significantly shorter in group 1 than in group 2 (p<0.001). The mean number of lymph nodes removed was 27.31±10.36 in group 1 and 30.87±8.3 in group 2 (p=0.041). Only at the presacral region was the mean number of lymph nodes removed significantly fewer in group 1 than in group 2 (p=0.001). Intraoperative and postoperative complications and drain withdrawal time were similar in both groups (p=0.058, p=0.391, p=0.613, respectively). Conclusions: When extended PLND was performed before RC, the duration of RC and consequently the total duration of the operation were significantly shorter than when extended PLND was performed after RC. Practitioners may consider performing extended PLND before RC and rechecking the presacral area for additional lymph nodes after RC, particularly in elderly patients with high co-morbidity for whom the duration of surgery matters.