Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(77)
- Merdan, Mehmet(73)
- Duran, Celal(54)
- Ozdes, Duygu(50)
- Baltaci, Cemalettin(45)
- Kaygusuz, Abdullah(45)
- Kulakaç, Nurşen(39)
- Ashyralyyev, Charyyar(38)
- Karsli, Orhan(37)
- Demir, Selim(36)
- Öztürk, Serkan(36)
- Dokuz, Abdurrahman(35)
- Turan, Ibrahim(35)
- Araz, Onur(33)
- Kandemir, Raif(31)
- Sipahi, Ferkan(30)
- Topal, Fevzi(30)
- Kurt, Kemal(28)
- Peker, Iskender(28)
- Arslan, Mehmet(27)
- Baltacı, Cemalettin(27)
- Maden, Nafiz(27)
- Ozturk, Samet(27)
- Aydin, Aydanur(26)
- Vural, Alaaddin(26)
- Bayrakdaroglu, Serdar(25)
- Kurnaz, Muammer(25)
- Reis, Hatice Catal(25)
- Akar, Zeynep(24)
- Aydin, Faruk(24)
- Gücer, Mehmet Ali(24)
- Topal, Meryem(24)
- Yolcu, Halil(24)
- Yücel, Cem(24)
- Anaç, Halil(23)
- Kankal, Murat(23)
- Ürkek, Bayram(23)
- Aliyazicioglu, Yuksel(22)
- Günen, Mehmet Akif(22)
- Tuncer, Metin(22)
Yayınlar
- Derleme MakaleAçık Erişim2018Scopus SJRQ3A REVIEW OF FLOW BOILING IN MINI AND MICROCHANNEL FOR ENHANCED GEOMETRIES
Çebi, Alican; Celen, Ali; Donmez, Aydin Haci; Karakoyun, Yakup; Celen, Pinar; Cellek, Mehmet Salih; Dalkiliç, Ahmet Selim; Taner, Tolga; Wongwises, Somchai
Flow boiling researches in enhanced geometries practiced recently have been summarized in this review. Classical approximations in macroscale flows have not applied to the flows with small hydraulic diameters, so, this subject has been paid attention by the researchers. Application areas of these structures are increasing continuously due to cooling need in small confined spaces. The related studies have been reviewed in a chronological manner and their parameters have been given in a table in order for the researchers to observe the scientific duration regarding the progresses on this subject. Almost all papers on this subject have been produced after 2000, therefore, this subject is considered as an actual one to improve and worth to study in the literature. This study can not only be evaluated as the beginning argument for the researchers involved in flow boiling process in mini and microchannel, but it also consists of new works on the investigated subject.
AtıfScopus35WoS30OpenAlex33TR Dizin4
İncele - MakaleYalnız künye2018Scopus SJRQ2Automatic extraction of sparse trees from high-resolution ortho-images
Bayram, Bulent; Seker, Dursun Zafer; Jamil, Akhtar; Reis, Hatice Catal; Demir, Nusret; Bozkurt, Salih; Ince, Abdulkadir; Kucuk, Turgay
Obtaining information about tree species distribution in agricultural lands is a topic of interest for various applications, such as tree inventory, forest management, agricultural land management, crop estimation, etc. This information can be derived from images obtained from modern remote sensing technology, which is the most economical way as compare to field surveys covering large geographic areas. Therefore, in this study, a new method is proposed for extraction and counting of sparse and regular distributed individual pistachio trees from agricultural areas on large scale from high-resolution digital ortho-photo maps, which were obtained using an airborne sensor (Ultracam-X). The input images were first smoothed by applying Gaussian filter to reduce the impact of noise. Normalized difference vegetation indices (NDVI) were then derived to obtain vegetation areas followed by Otsu's global thresholding algorithm to obtain candidate tree areas. Further, connected component (CC) analysis was applied to segregate each object. Morphological processing was performed to fill holes within tree objects and get smooth contours, which were obtained by using the Moore-neighbor tracing method (MNTM) for each CC, while geometrical constraints were applied to undermine possible non-tree elements from output image. To further improve the segmentation results for sparse trees, a new method was applied, called quadratic local analysis (QLA). QLA helped to segment the trees, which were missed by the Otsu method due to low contrast and resulted in improved accuracy (3-6%). The obtained results were compared with well-known support vector machine (SVM) classifier. Proposed method produced slightly better results (1-5%) than SVM for extraction of pistachio trees and obtained accuracy for QLA and SVM were 96 and 91% for region 1, while 91 and 90% for region 2 respectively.
AtıfScopus3WoS2OpenAlex3İncele - MakaleAçık Erişim2017The econometrical analysis of the relationship between urbanisation and economic growth (the case of eu countries and turkey)
Sancar, Cenap; Özkök, Canan Sancar
The aim of this study is to determine whether there is a relationship between urbanisation and economic growth in terms of 13 European Union Member countries and of Turkey as well as to determine the direction of this relationship, if it exists. In the study, GDP per capita was used as a dependant variable where population density and employment rates of industry and services sectors, which represent the urbanisation, as well as the employment rate of agriculture sector and general employment rate, which were included in our model, were used as independent variables. The annual series of the variables of the model that was created within the scope of the study for the period between 1990-2014 were analysed by panel co-integration method. According to panel causality test, there is a bilateral causality relationship between GDP and employment rates of services, industry, and agriculture sectors. Additionally, there was a unilateral causality relationship from GDP towards urban population density and towards general employment rate. Also, according to the DOLS and FMOLS results, the increases in urban population density and in the employment rate of services sector have a positive effect on GDP per capita. Findings from the study show that urbanisation and economic growth are mutually dependent processes in 13 EU member countries and in Turkey.
AtıfOpenAlex9TR Dizin5İncele - MakaleYalnız künye2017N-Gram Analysis of Historic Development of Fundamental Terms Regarding Corporate Sustainability1
Tuna, Özlem; Ural, M Nuri
Sustainability is a rising concept. It is important to set forth the developmentprocess of the term and to reveal the topics which are stressed by the specialists in order to understand the concept correctly. With this study, all the books written in English and saved in 'Google Books' database starting from the 1900s to the recent years have been scanned with N-gram analysis and the evolution of corporate sustainability concept has been investigated. From 19 experts 15 key words about corporate sustainability were asked. Total 236 entries have been categorized in 62 themes and among them 17 keywords which have the highest frequencies were identified and used in N-gram analysis. This study is especially important to show which term is started to flourish on literature on which time period. It is meaningful that some terms show co-changes. This may be helpful to show the relations between these terms.
- MakaleYalnız künye2017Türkiye’ de marketlerde satılan alkolsüz içeceklerin etanol seviyeleri
Burnaz, Nesibe Arslan; Küçük, Murat; Doğan, Hacer; Alkan Türkuçar, Semra; Dolu, Ömer Faruk; Alevci, Aylin; Aktaş Karaçelık, Ayça; Polat, Damla
Etanol, birçok farklı alanda kullanılan temel kimyasallardan biri olmasına rağmen, diyetle alındığında sarhoş edici ve zararlı etkileri yüzünden tıbbi, sosyal ve dini konular bakımından önemli tartışma konularından biri olmuştur. Gıdalardaki ve içeceklerdeki etanolün varlığı, miktarı ve etkilerinin kontrolü önemli araştırma alanlarındandır. Alkolsüz içeceklerle ilgili düzenlemeler ülkeden ülkeye farklılık gösterir. Türkiye’de Türk Gıda Kodeksi Alkolsüz İçecekler Tebliği’ne (2007/26) göre izin verilen en yüksek etanol miktarı 3,0 g/L’dir. Kodekse göre, hacimce % 0,3’ den daha az etanol içeren içecekler, alkolsüz içecekler olarak tanımlanır. Bu çalışmada; kolalar, portakallı sodalar, %100 meyve suları, meyve nektarları, meyve aromalı sodalar, enerji içecekleri, ayran ve kefirin bilinen markaları alkolsüz içecek test numunesi olarak kullanıldı. Bu amaçla, Türk Standartları Enstitüsü’nün TS 1594 Meyve ve Sebze Ürünleri Etanol Muhtevası Tayininin Titrimetrik Yöntemi bir değişiklik yapılarak kullanıldı. Numunelerdeki etanol Clevenger tipi destilasyon aparatıyla hidrodestilasyonla destillendi, ki bu uygulama yöntemi daha uygulanabilir hale getirmiştir. Numunelerde bulunan en yüksek binde etanol konsantrasyonları sırayla kolalarda 0,14, portakallı kolalarda 0,53, meyve aromalı sodalarda 0,88, enerji içeceklerinde 0,47, meyve sularında 1,46 ve süt ürünlerinde 0,25 olarak bulundu. Bütün numunelerin etanol seviyesi kodekste izin verilen sınırın altında bulundu.
- MakaleYalnız künye2017Türkiye’de 2010-2016 Yıllarına İlişkin Yönetim Muhasebesi Alanında Yapılan Çalışmaların Değerlendirilmesi
Tosunoğlu, Büşra; Cengiz, Selim
Son yıllarda yaşanan gelişmeler sonucunda gerek akademisyenler gerekse uygulayıcılar açısından yönetim muhasebesine verilen önem giderek artmaktadır. Bu doğrultuda çalışmanın amacı Türkiye’deki yönetim muhasebesi alanında yapılan çalışmaların genel profilinin değerlendirilmesini içermektedir. Bu kapsamda 2010-2016 yılları itibariyle Türkiye’de muhasebe alanında en fazla makalenin yer aldığı MUFAD, MÖDAV, Mali Çözüm, Muhasebe ve Denetime Bakış ve Muhasebe ve Vergi Uygulamaları dergilerinde yayınlanan yönetim muhasebesiyle ilgili 118 makale incelenmiştir. İnceleme sonuçlarına göre araştırmaların büyük çoğunluğu “maliyet yönetimi”, “maliyet muhasebesi” ve “performans ölçümü ve değerlendirme” konularını içermektedir. Ayrıca söz konusu çalışmalara bakıldığında büyük oranda firmalara odaklanıldığı, ikincil veri kaynağı tercih edildiği ve genellikle örnek olay çalışması yönteminin kullanıldığı tespit edilmiştir.
AtıfTR Dizin5İncele - MakaleAçık Erişim2017A Research on the Relationship Between Performance and Medicine Styles
Bostan, Sedat
Objective: The behavior and approach of doctors have always been important. In theliterature, these behavior styles are often described through doctor-patient relationship. The aim ofthis study is to go beyond this limitation and to determine practice styles and discover the relationship between these styles and performance. A new model of the style of practice developmentprocess is proposed. Material and Methods: The practice style and performance scale developed bythe author was used. Scales are applied to specialist physicians, a validity of the scale and discoveryof the scales is provided with exploratory factor analysis. The relationship between practice stylesand performance is analyzed with correlation and regression. Results: The exploratory factor analysis results shows that the scale items are collected in five dimensions after varimax rotation. Thesedimensions explain 60,7% of the cumulative variance. Barletta's test was significant (chi-square =682.945, P <.001) and the KMO value achieved (0.684) provide evidence that data is suitable for factor analysis.The factor loads of the material loaded to resulting factors ranged from 0.420 to 0.917.These values are within acceptable limits. According to the study findings, four types of practicehave been described. A positive correlation has been identified between performance and numerical and patient-friendly styles. It was not found any relationship between performance and idealistic and conservative medicine styles. Conclusion: An analysis of medicine styles will contributeto medicine services, evaluation of the performance of the health care business and patient satisfaction.
AtıfOpenAlex1İncele - MakaleYalnız künye2017Validity And Reliability Of The Turkish Version Of Constipation Assessment Scale In Nursing Students
Doğan, Melike Demir; Aktuğ, Cemile
Aim: Constipation is a common symptom for many patients and constipation assessment scales used by the nurses providing care take a long time to apply. Assessment of constipation is important to improve its management. Therefore, our study aimed to determine the validity and reliability of the Turkish version of The Constipation Assessment Scale. Methods: The Constipation Assessment Scale was translated into Turkish and was administered to a sample of 140 participants after the validation of cultural adaptation. The test–retest method was used to assess the scale’s stability over time. Internal consistency reliability was evaluated with Cronbach’s alpha coefficients. Results: The Constipation Assessment Scale’s structural validity was determined with confirmatory factor analysis and exploratory factor analysis was used to examine dimensionality. The test-retest reliability showed almost perfect agreement, with an ICC of 0.744 (p<0.001) for the total score of the Turkish version of the Constipation Assessment Scale. The internal consistency of the Turkish version of the Constipation Assessment Scale was good (Cronbach’s alpha = 0.784). Conclusion: The linguistic and psychometric evaluation demonstrated the validity of the Turkish version of Constipation Assessment Scale. It is consisting of eight items and providing easy use. So that nurses can assess constipation in less time.
AtıfTR Dizin1İncele - MakaleYalnız künye2017An Attempt to Develop A Scale on the Decision Process: The Manager Decision Time Scale
Bostan, Sedat; Durmus, Ibrahim
The aim of this study is to develop a valid and reliable data-obtaining tool for exploring which decision stage deems sufficient for managers in the public or private sector, how they use time and how they act in different occasions. Also, a scale demonstrating the approaches which managers are following in their decision processes has not been seen among past studies. This study has been carried out in order to close this gap. The scale has been developed in consideration of the managers’ recommendations about the decision process. Sampling method applied in research is easy sampling method. The 389 participant of this study consist of public and private sector managers in the cities of Gümüşhane and Bayburt in Turkey. The results of this study are assembled under four factors as “manager’s problem noticing time, manager’s problem defining time, manager’s problem solving time, and the manager’s decision time on different occasions.” A “Manager Decision Time Scale” containing 13 items has been developed from these Likert scale factors. It has been tested for validity by Model-Defining Factor Analysis. The scale that was formed with the data obtained at the end of this study has been proved to be a valid and reliable data-obtaining tool.
AtıfTR Dizin1İncele - MakaleYalnız künye2017Mathematical modeling of thin-layer microwave drying of corn husk and investigation of powder properties
Akdogan, A.; Koç, G. Caliskan; Dirim, S. N.
The aim of this study is to investigate the effect of different microwave powers on the drying kinetics of chopped corn husks and to determine the properties of the corn husk powder obtained after grinding the dried product. The drying behavior of corn husks was determined using eleven commonly used thin-layer models. The obtained powders were analyzed for moisture content, water activity, color, tapped and bulk densities, wettability, flowability, and cohesiveness. In addition, the effective moisture diffusivity and activation energy of corn husks were calculated from drying data. From the analysis of the results, the drying rate and the drying time of corn husk slices considerably decreased with increasing microwave power. Among all used drying models, the Page model was found to satisfactorily describe the kinetics of microwave drying of corn husk. The effective moisture diffusivity values ranged from 2.264x10(-10) to 8.941x10(-10) m(2)s(-1).
AtıfWoS2İncele - MakaleYalnız künye2017Chemical composition and bioactive properties of the essential oil of Rhinanthus angustifolius subsp grandiflorus
Kaya, A. A.; Üçüncü, O.; Ilter, S. M.; Baltaci, C.; Öztürk, S.
In this study, the chemical composition and antimicrobial activities of the essential oil of the Rhinanthus angustifolius subsp. grandiflorus plant were investigated. Essential oil was obtained from all parts of the plant by hydrodistillation and was analyzed by GC-FID and GC-MS. 31 components representing 99.46% of the total oils were characterized. The main components of these species were found to be 2,3-dihydro-5-methyl-1H-indene (25.14%), alpha-cubebene (19.27%), 1-hexadecene (15.59%) and hexadecanoic acid (12.14%). The antimicrobial activity of the isolated essential oil was investigated. Antimicrobial activity was observed against B. cereus, E. coli, E. coli O157:H7 and S. Aureus microorganisms. Moreover, an effect on the ferments of B. cereus, E. coli, E. coli O157:H7 and S. Aureus was detected.
AtıfWoS4İncele - MakaleAçık Erişim2017Calculation of the Index of Turkey's Vulnerability in Natural Disasters
Bostan, Sedat; Yaprak, Unal
Aim: The aim of this study was to determine the vulnerability levels of Turkey in terms of natural disasters and to guide decision makers and strategists in this field. In the study, disaster data obtained for 1987-2011 were used, and the disaster of type was most observed in our country. Materials and Methods: Data vulnerability indices against the disasters were calculated using a Data Envelopment Analysis Program (DEAP) 2.1 program with a Data envelopment analysis-based output-oriented Malmquist Total Factor Productivity Index method. Results: The regions of Turkey, which have the highest vulnerability index for the disasters, were TRA2 (0.323), TRB2 (0.305), and TRB1 (0.287) regions. In addition, it was seen that in the Black Sea region, the TR82 (0.267) region was more vulnerable than the other places of the region. In this study, a picture of the whole country over a period of 25 years in terms of disasters was captured. Conclusion: In the picture, it is seen that economic and social costs endured due to disasters are separated into two regions starting from the region of Eastern Anatolia and the north branch extends across the Black Sea region and the other south branch reaches to the Mediterranean.
AtıfOpenAlex1İncele - MakaleYalnız künye2017THE USABILITY OF VOLCANIC ROCKS FROM UPPER EUPHRATES PART IN THE EASTERN ANATOLIA REGION AS CONCRETE AGGREGATE
Aksüt, Yavuz Selim; Yetgin, Sukru
In this study; the engineering properties of volcanic rocks obtained from four different quarries in the province of Erzincan region in the Upper Euphrates Part in the Eastern Anatolia Region were investigated. In laboratory studies, the experiments including bulk and aggregate tests (bulk and dense unit weight, specific mass, water absorption, Los Angeles test for resistance to wear, freezing resistance and uniaxial compressive strength) were conducted on 5 volcanic samples according to the standards (Turkish Standard, British Standard and ASTM) and in the second stage, grading of concrete tests (grading of the concrete aggregates, concrete preparation, slump test, specific density of concrete, uniaxial compressive strength, modulus of elasticity, splitting tensile strength, abrasion resistance and capillarity) were performed on the concrete samples with volcanic aggregates. For fresh concrete composition, water/cement ratio was selected as the main variable providing homogeneous mixing and the highest strength to the concrete samples with a specific granulometry. Cylindrical concrete samples were produced with a variety of water/cement ratios cured for 7 and 28 days in water and their compressive strengths were assessed in the light of their physical and mechanical properties. The results obtained from aggregates and concrete tests, which were performed in line with the standards showed that especially Yassitepe-Dogu (YTD) sample, one of the volcanic rocks from Erzincan region can be used as concrete aggregate. It was observed that compressive strength of the concrete samples could satisfy C25/30 strength class and upper classes. In addition, it was understood that they can be used in highways, bridges, dams, buildings etc., especially as structural concrete.
AtıfWoS1İncele - MakaleYalnız künye2017Scopus SJRQ1The efficiency of bedside ultrasonography in patients with wrist injury and comparison with other radiological imaging methods: A prospective study
Oguz, Ahmet Burak; Polat, Onur; Eneyli, Muge Gunalp; Gulunay, Behnan; Eksioglu, Merve; Gurler, Serdar
Study objective: Our aim was to determine the efficiency of ultrasound (US) scanning in patients with wrist trauma admitted to the emergency department and to compare US diagnostic usagewith other radiological imagingmethods. Methods: Patients who presented to the emergency department with wrist injury and who met the inclusion criteria and exclusion criteria were eligible. For all patients, US evaluation of thewhole wristwas performed by an emergency physician before other radiological imagingmethods (radiographies, computed tomography (CT) and magnetic resonance (MR) imaging). All of the patients included in the study underwent US, radiography, CT, and MR. Results: During the study, 122 patients were admitted with a wrist injury. After filtering for the exclusion criteria, 80 patients were included in the study. The sensitivity of US scanning in detecting fractures was 95.31% (95% confidence interval [CI]: 87.1-98.39), the specificity was 93.75% (95% CI: 71.67-98.89), and the positive predictive value was 98.39% (95% CI: 91.72-99.85), and the negative predictive value was 83.33% (95% CI: 72.98-90.41). The sensitivity of US scanning in detecting tendon and ligamentous structural injury was 66.67% (95% CI: 41.71-84.82), the specificity was 100% (95% CI: 94.42-100), the positive predictive valuewas 100% (95% CI: 94.29-99.89), and the negative predictive was 92.86% (95% CI: 84.25-97.14). Conclusion: US scanning is an effective method that can be applied in the emergency department to adult patients to diagnose distal forearm and carpal bones fractures. In soft tissue injuries, US and MR examinations produce similar results. (C) 2017 Elsevier Inc. All rights reserved.
AtıfWoS18OpenAlex25
İncele - BildiriAçık Erişim2017Scopus SJRQ1Pressure from superiors and older age increase the risk of burnout syndrome among psychiatric trainees: A nation-wide survey in Turkey
Capraz, N.; Ozalp, D. Ceylan Tufan; Yalcin, M.; Can, E. Tellioglu; Alkin, T.
AtıfWoS2OpenAlex2İncele - MakaleYalnız künye2017Scopus SJRQ1Late Jurassic Magmatism and Stratigraphy in the Eastern Sakarya Zone, Turkey: Evidence for the Slab Breakoff of Paleotethyan Oceanic Lithosphere
Dokuz, Abdurrahman; Aydinçakir, Emre; Kandemir, Raif; Karsli, Orhan; Siebel, Wolfgang; Derman, Ahmet Sami; Turan, Mehmet
Middle-Late Jurassic Cimmerian events in Turkey have been actively discussed in the past three decades, but proposed tectonic models associated with magmatism, metamorphism, and stratigraphic features remain controversial. To address this issue, Upper Jurassic mafic lavas are investigated at three locations (Alucra, Gumushane, and Olur) in the eastern Sakarya Zone, northeastern Turkey. These lavas are submarine and form planar flows parallel with the bedding plane in the Upper Jurassic carbonate sequence near the base or just below in the clastic sedimentary rocks. The basaltic lavas show calc-alkaline features and possess Nb-Ta values and Nb/U, Nb/La, and Ce/Pb ratios that are greater than those of island arc basalts. Multielement patterns are almost hump shaped, similar to ocean island basalts, which experience Pb depletion and weak negative Nb-Ta, Zr-Hf, and Ti anomalies. The low initial (Sr-87/Sr-86) ratios (0.70372-0.70554), positive initial epsilon(Nd) values (+2.7 to +4.4), and initial Pb isotope ratios that plot between mid-ocean-ridge and ocean island basalts are consistent with a melt derived from subcontinental lithospheric mantle, metasomatized by earlier fluids from subducted sediments and plume materials from the asthenosphere. Moderate Dy/Yb ratios with an average value of 1.8 imply partial melting in the spinel-garnet transition zone at depths of similar to 70-100 km. Slab breakoff is suggested as a geodynamic mechanism that accounts for these geochemical signatures. This inference is also favored by stratigraphic and sedimentologic evidence from the Upper Jurassic-Lower Cretaceous sedimentary rocks, which is consistent with short-lived vertical (epirogenic) movements in the region. Lower-Middle Jurassic sequences are transgressive, suggesting that subduction-related extension opened a backarc basin (Neotethys) in the south of the Sakarya Zone. Upper Jurassic-Lower Cretaceous carbonates point tectonically to tranquility during carbonate deposition in the Neotethys Ocean, which seems to have been achieved by complete closure of the Paleotethys in the north. About 15-20 m.yr. later (Kimmeridgian), after first carbonate deposition, intraplate-typemafic lavas ascended up to the shelf surface of the Neotethys. This was followed by formation of disconformity surfaces and then accumulation of coarse clastic sediments. All this points to a short-lived epirogenic movement that we ascribe to the breakoff of the southward-subducting Paleotethyan oceanic lithosphere in the Late Jurassic.
AtıfWoS73OpenAlex76İncele - BildiriAçık Erişim2017Scopus SJRQ1MEDIAN AND ULNAR NERVE CROSS-SECTIONAL AREA IN CARPAL TUNNEL SYNDROME WITH EXTRATERRITORIAL SPREAD OF SENSORY SYMPTOMS
Kaplan, B. Mansiz; Leblebicier, M. Akdeniz; Yagci, I.
- MakaleYalnız künye2017Scopus SJRQ2Finite Modeling Updating Effects on the Dynamic Response of Building Models
Günaydin, M.; Adanur, S.; Altunisik, A. C.; Sevim, B.; Bayraktar, A.
An improved finite element model was used to obtain more accurate modeling of engineering structures. The main goal of this paper was to determine how this improved modeling procedure affects the dynamic response of buildings based on experimental modal parameters such as natural frequencies, mode shapes and damping ratios. For experimental assessment, three small, one-story, two-bay, reinforced concrete buildings with raft foundation were constructed under laboratory conditions. The initial three-dimensional finite element models, built with the ANSYS software, were used to analytically identify modal parameters, including natural frequencies and mode shapes. Following the analytical study, the ambient vibration tests were performed to obtain modal parameters, experimentally. The enhanced frequency domain decomposition method and the stochastic subspace identification method were used to identify the modal parameter. The analytical and experimental modal parameters were compared and then initial finite element models were updated to minimize the differences by changing of some uncertain parameters such as materials properties. With model updating, the maximum difference between the measured and initially obtained frequency was reduced from 28.47 to 4.88%. To show the model updating effect on dynamic response of building models, dynamic analysis with the experimental computed damping ratios and 5% damping ratio were carried out using 1992 Erzincan earthquake ground motion record. For the experimental damping ratios, the maximum differences in the displacements and stresses between the initial and updated models were obtained as 23 and 32%, respectively. These differences were calculated as 43 and 15 % for the 5 % damping ratio. Comparisons of dynamic analyses results for the initial and updated model show that the finite element model updating affects the dynamic response of the buildings considerably.
AtıfWoS12OpenAlex11İncele - MakaleYalnız künye2017Scopus SJRQ1Cordierite-bearing strongly peraluminous Cebre Rhyolite from the eastern Sakarya Zone, NE Turkey: Constraints on the Variscan Orogeny
Dokuz, Abdurrahman; Külekçi, Elif; Aydinçakir, Emre; Kandemir, Raif; Alçiçek, M. Cihat; Pecha, Mark E.; Sünnetçi, Kadir
The Cebre Rhyolite with an outcropping area up to 12 km(2) is one of the rare extrusions in the Variscan basement of the Sakarya Zone. The unit consists of high-K calc alkaline rhyolites (SiO2 = 74-82 wt.%). Abundant phenocrysts of quartz and K-feldspar are accompanied by subordinate cordierite phenocrysts, rare muscovite microphenocrysts and biotite microcrysts set in a fine-grained groundmass. Three types of rock fragments (xenoliths) have been recognized; (i) porphyritic, (ii) equigranular hypabyssal and (iii) hypocrystalline fragments. Zircon U-Pb dating indicates that the Cebre Rhyolite was extruded at 332.8 +/- 4.38 Ma, which post-dates the Variscan low temperature metamorphism and pre-dates the emplacement of I-type granitic intrusions (325-303 Ma).The samples are strongly peraluminous with A/CNK values ranging from 1.48 to 2.95 and A/NK from 1.49 to 2.99. They have very high K2O (3.72-7.42 wt.%) and Al2O3 (10.77-14.11 wt.%) contents, but very low CaO (0.02-0.21 wt.%), Na2O (0.05-0.78 wt.%) and MgO (0.3-0.21 wt.%) contents. The samples show geochemical affinity with the upper continental crust, e.g., enrichment of large ion lithophile elements (LILEs; K, Rb, U, Th, Pb), depletion of high field strength elements (HFSEs; Nb, Ta, Ti), Sr, P and Eu, but epsilon Nd-(t) values (- 3.06 to - 8.75) and isotope ratios of Sr-(t)((87) Sr/Sr-86 = 0.70499-0.70915) and Pb-(t) (Pb-206/Pb-204 = 16.41-17.570, Pb-207/Pb-204 = 15.54-15.59, Pb-208/Pb-204 = 36.20-37.22) are similar to those of the lower crust. Geochemical and isotope data indicate that the Cebre Rhyolite was generated by melting of metapelitic rocks with some addition of intermediate metaigneous derived magma. As a geodynamic model, we propose that the Variscan Orogeny in Turkey was occurred by collision of Gondwana with an arc/terrane separated from the southern margin of Laurussia. This collision was followed shortly after by splitting of oceanic lithosphere into two pieces and sinking down into asthenosphere. Rapid upwelling of asthenosphere to space emptied by previous oceanic lithosphere provided heat for high temperature metamorphism and anatexis of metasedimentary rocks in the crust. (C) 2017 Elsevier B.V. All rights reserved.
AtıfWoS28OpenAlex33İncele - BildiriAçık Erişim2017The Relationship between Types of Bullying experienced by Primary School Students and Their Anxiety, State-Trait, Self-Esteem And Certain Socio-Demographic Characteristics
Demirbag, Birsel Canan; Çiçek, Zeynep; Yigitbas, Cagla; Özkan, Cigdem Gamze; Dinçer, Ahmet; Soriano, E; Sleeter, C; Casanova, MA; Cala, VC
Bullying experienced by children causes negative emotions which lead to failure in their lives. This study aims to determine the relationship between types of bullying and anxiety, state-trait, self-esteem and certain socio-demographic characteristics of primary school students who exposed to bullying at least two times. A primary school in the city center of eastern part of Turkey was selected by simple random sampling method. A socio-demographic questionnaire, which was developed by the researchers, and state-trait anxiety inventory and self-esteem scales were provided to 595 students in this school by explaining how to fill out the questionnaires between January 1 and January 31, 2015. The most common types of bullying expressed by children were kicking and slapping in the physical bullying 11.7%, kidding in the verbal bullying 14.1%, discrimination in the emotional bullying 7.3% and sexually explicit expressions in the sexual bullying type 4.2%. (C) 2017 The Authors. Published by Elsevier Ltd.
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