182 research outputs found
Three essays in applied econometrics
No full textThis dissertation presents three essays which are linked by the use of econometric models to explain problems that are only explained descriptively in the literature. The first essay, statistically shows that a systematic measurement bias can significantly distort predictions obtained using an international accounting framework due to the sizable diversity of the parties involved in it. Once the measurement bias is taken into account, the average value gains on the US foreign asset and liability categories are estimated to be smaller, and no evidence is found on positive yield differential. The second essay estimates the value gains and the mismeasurement using data at multiple frequencies. The results show that positive sizable return differential is present after 2002. The third essay shows that the increasing availability of prescription opioids threatens sellers' profit margin since it is a close substitute for heroin and forces sellers to find alternative methods to compensate buyers in the case of a negative supply shock.Ph.D.Includes bibliographical referencesIncludes vitaby Emel Oylum Yildiri
Synthesis, spectroscopic characterization and DFT calculations of novel Schiff base containing thiophene ring
No full textWOS: 000425075900011In this study, a new Schiff base derivative, 2-[(2-hydroxy-5-thiophen-2-yl-benzylidene)-amino]-6-methyl-benzoic acid (5), which has a thiophene ring and N, O donor groups, was successfully prepared by the condensation reaction of 2-hydroxy-5-(thiophen-2-yl)benzaldehyde (3) and 2-amino-6-methylbenzoic acid (4). The characterization of a Schiff base derivative (5) was performed by experimentally the UV-Vis., FTIR, H-1 and C-13 NMR spectroscopic methods and elemental analysis. Density Functional Theory (DFT/B3LYP/6-311+G(d, p)) calculations were used to examine the optimized molecular geometry, vibrational frequencies, H-1 and C-13 NMR chemical shifts, UV-Vis. spectroscopic parameters, HOMO-LUMO energies and molecular electrostatic potential (MEP) map of the compound (5) and the theoretical results were compared to the experimental data. In addition, the energetic behaviors such as the sum of electronic and thermal free energy (SETFE), atomic charges, dipole moment of the compound (5) in solvent media were investigated using the B3LYP method with the 6-311+G(d, p) basis set. The obtained experimental and theoretical results were found to be compatible with each other and they were supported the proposed molecular structure for the synthesized Schiff base derivative (5)Anadolu University Scientific Research Projects (BAP) [1705F213]; BAP [1102F027, 1304F064]; [1306F110]This study was supported by Anadolu University Scientific Research Projects (BAP) through project 1705F213. The author also gratefully thank to BAP for supporting Gaussian 09 and Gauss View 5.0 programs with the projects (Project No 1102F027 and 1304F064) and its financial support for Agilent DD2 NMR Spectrometer (Project No. 1306F110)
Assessment of implication of competitiveness on human development of countries through data envelopment analysis and cluster analysis
No full textFüsun Ülengin (Dogus Author) -- Özgür Kabak (Dogus Author) -- Şule Önsel (Dogus Author) -- Emel Aktaş (Dogus Author)Globalization speeds up competition among nations in various sectors. In terms of multinational and transnational phenomena, countries are seen as inescapable from competition, thus the linking of the term global with "competitiveness." The research described here explores the relationship between the competitiveness of a country and its implications for human development. For this purpose, using data envelopment analysis (DEA) and cluster analysis, 44 selected countries were evaluated. An output-oriented super-efficiency model where global competitiveness indicators are taken as input variables with human development indicators as output variables is utilized. Then cluster analysis depending on the competitiveness and human development indicators is conducted by using self-organizing maps to specify the development levels of the countries. Both analyses are repeated for years between 2005 and 2007. Finally, the relationship between the super efficiency scores and the development levels is analyzed
The Analysis of Conceptual Studies On Contemporary Ceramics Art in Light of Peter Osborne's Conceptual Art Initiative
No full textSanat olgusu ortaya çıktığı dönemden günümüze değin yapılan pek çok sanat eseriyle farklı nitelik ve yorumlar kazanarak gelişmiştir. Bu gelişmeler ve dönüşümler sonucunda 20.yüzyılın ikinci yarısından itibaren içerisinde bulunduğumuz dönem postmodern olarak adlandırılmakta ve sanatın sonu şeklinde değerlendirilmektedir.Sanatta yaşanan bu büyük dönüşümler pek çok disiplini olduğu gibi seramik sanatını da etkilemiştir. Seramik sanatı 19.yüzyıl ve sonrası sanayi devriminden sonra gelişen teknoloji ve farklılaşan kültürel yapılarla, 20.yüzyılda sanatsal bir disiplin olarak kabul görmüştür. Bu süreçte çağdaş seramik sanatçılarının yorumlarıyla, kavrama yönelik eserler ortaya konmuştur.Kavramsal Sanat ise temelinde düşüncenin yapıta üstünlüğü fikrini barındıran Postmodern dönem içerisinde büyük bir kırılma yaratmış olan bir eğilimdir. Kavramsal sanat, seramik sanatının evrensel nitelik kazanmasına, geleneksel ve modernist uslüba karşı duran kavramsal seramik eserler üretilmesine olanak sağlaması bakımından seramik sanat tarihinde önemli bir yere sahiptir. Postmodernizmin eklektik yapısıyla birleşen kavramsal seramik eserler çağın gerçekliklerinin kavranmasını kolaylaştırırken, geçmişle bağ kurarak belgesel bir nitelik taşımaktadır. Bu çalışmada, çağdaş seramik sanatında, sanat anlayışında bir dönüm noktası olan kavramsal sanatın önemi ve seramik sanatına katkıları felsefe profesörü ve yazar Peter Osborne'nin kavramsal sanat açılımı doğrultusunda incelenmektedir.Ever since it emerged to present, the art fact has developed by getting different qualities and comments with many art works. As a result of these developments and transformations, the period which we are in since the second half of the 20th century is called Postmodernism and considered to be end of the art These efficient transformations as influenced the ceramic art as many disciplines. In the 20th century, ceramic art has been accepted as an artistic discipline with the 19th century and later by industrial revolution, the developing of technology and differing cultural structures. In this process, conceptual art works were created by contemporary ceramic artists' interpretations. Conceptual art is a trend which created a big break in the postmodern period, which is based on the idea that is thought, has superiority to the art work. In the ceramic art history, conceptual art history has an important place because of enabling of the creating ceramic art works which stands against the traditional and the modernist style. Conceptual ceramic art works, which combine with eclectic nature of postmodernism, has a documentary feature by establishing a link with the past while make it easy to grasp realities of era. In this study, the importance of conception art, which is a milestone in the art conception and its contributions to ceramic art, are examined according to philosophy professor and author Peter Osborne's conceptual art initiative
Hotel employees' beliefs on unethical behavior
No full textYükselen, Cemal (Arel Author)Purpose – The purpose of this study is to explore the beliefs of employees who work in different positions in the hotels in Edirne, Turkey regarding unethical applications. Design/methodology/approach – The survey method was used to determine the hotel personnel’s unethical behaviors in the process of the service operation in hotels. The questionnaire was mainly developed from a Varinli study which was applied to the employees’ job-related ethics. Findings – The findings have been evaluated and analyzed using the SPSS 11.5. The mean value and the t-test were applied for the analysis. It was aimed to determine the beliefs of the hotel personnel’s about unethical behaviors according to the 20 statements related to the topic. It was understood that the respondents significantly did not accept unethical behaviors that were scaled with 20 statements. Research limitations/implications – Some statements in the questionnaire were either changed or extended, considering all the hotels in Edirne. The questionnaire was applied in 15 hotels from 9-13 March in 2009 and excluded employees who were not on the premises during the process. After a week 160 valid questionnaires were either collected from or posted by those concerned. Practical implications – The research aims to investigate the job-related unethical beliefs of hotel employees. The housekeeping, food and beverage, and front-office departments are mainly studied from the perspecive of the unethical applications. Nevertheless, the answers represented only the personnel’s ethical beliefs. Whether they would ‘‘actually perform in such a way’’ in real life is difficult to verify. It is not possible to verify the employees’ actual behavior compared with their answers in the questionnaire. Originality/value – The paper is based on a Varinli study which was applied to the employees’ job-related ethics. In 2004 Varinli studied the hotel employees’ beliefs regarding unethical applications in 3- and 4-star hotels in Capadocia
Metagenomik Alalysis of Environmental Microbial Sources: Case Study of Çal Cave
No full textMetagenomic Analysis Of Environmental Microbial Sources: Case StudyOf Çal CaveHasan Demirci1, Emel Ordu1*1 Department of Molecular Biology and Genetics, Yildiz Technical University, Faculty of Arts and Sciences, ,Turkey*Corresponding Author: [email protected], which constitute the vast majority of life forms in the environment, have animportant usage in the biotechnological fields such as medicine, food, energy, agriculture etc.However, it is known that 1% of these microbial diversity have been identified withtraditional cultivation methods, and a very few of them have been cultured and employed inindustrial purpose. Metagenomics, which is a culture-independent approach, and developmentof next-generation sequencing technologies provide not only a wealth of phylogeneticinformation about the environmental microbial samples but also broaden the microbialresource utilization for industrially important enzyme researches. Caves where representunique environments in terms of microbial flora, are ideal habitats for searching novelmicroorganisms, consequently new enzymes. Çal cave in Trabzon is one of the importantkarstic caves in Turkey. We explored the microbial diversity of Çal cave by metagenomicanalysis in order to understand the potential of genomic sources in terms of new enzymes andbioactive compounds meeting industrial demand. Early results showed that cave soil wasdominated by Actinobacteria and Proteobacteria well known as potential sources of bioactivecompounds.Keywords: Actinobacteria, cave soil, metagenomics, Proteobacteria, taxonomic profiling,Acknowledgements: "This work was supported by Research Fund of the Yildiz TechnicalUniversity. Project Number: FDK-2019-3586 ".</p
Usage of ceramics for birdhouses as a material
No full textThe reason of this research is to study birdhouses which comes through out Ottoman to nowadays as an old Anatolian tradition, to display the changes of Turkish point of view to birdhouse tradition with the changing world and to investigate birdhouses and ceramic artists who works on birdhouses in ceramics art. Besides the history and development of birdhouses which comes from 13th century, birdhouses are investigated which are made in different techniques and different materials and it also investigated that native and foreign ceramics artist and their works who has works about birdhousesŞölenay, Emel, Çelikoğlu, Öncü (Anadolu Author)Bu araştırmanın amacı, Anadolu’da eski bir gelenek olan ve Osmanlı’dan günümüze kadar süregelen kuşevlerini araştırmak, değişen dünya ile beraber kuşevleri geleneğinde Türklerin bakış açılarındaki değişimleri ortaya koymak ve seramik sanatındaki kuşevlerini ve kuşevi üzerine çalışmalar yapan seramik sanatçılarını incelemektir. Geçmişi 13. yüzyıla kadar giden kuşevlerinin tarihi ve gelişiminin yanı sıra, değişik malzemelerle yapılan kuşevleri ve kuşevi yapım teknikleri ve ayrıca kuşevi üzerine eser veren Türk ve yabancı seramik sanatçıları ve bu sanatçıların eserleri incelenmiştir
A new approach in the treatment of ultrasound-guided synovial hypertrophy
No full textBackground/aim: Knee osteoarthritis (OA) causes pain and limited movement, negatively impacting daily life in older adults. Hypertrophy and changes in the synovial tissue significantly contribute to the pain. While intraarticular injections are common in OA treatment, specific therapies for hypertrophic tissue are rarely mentioned. This study aimed to evaluate the long-term outcomes of local anesthetic and steroid injections in the knee's intraarticular space and hypertrophic synovial tissue. Materials and methods: Our retrospective study included patients with grade 3 or 4 knee OA diagnosed with ultrasound-guided suprapatellar effusion and synovial hypertrophy. Pain was assessed using a numerical rating pain scale (NRS) and functional capacity was evaluated with the Western Ontario and McMaster Universities Osteoarthritis (WOMAC) Index. Effusion was first drained from the suprapatellar region using a 22-gauge spinal needle under ultrasound guidance, followed by lavage with 40 mL of 0.9% NaCl solution. A mixture of 10 mL (2 mL triamcinolone hexacetonide, 7 mL of prilocaine, and 1 mL of 0.9% NaCl) was injected intraarticularly, and 6 mL was injected into the hypertrophic synovial tissue. Patients were followed before the injection and at 1, 3, 6, 9, and 12 months after the injection. Results: Analysis of the WOMAC scores and NRS values at 1, 3, 6, 9, and 12 months after the injection revealed statistically significant reductions (p 0.05). Ultrasound evaluation indicated regression of the synovial hypertrophy tissue. Conclusion: This injection method, practiced in the treatment of synovial hypertrophy as one of the causes of pain in knee OA, reduced pain and significantly increased functional capacity
The relationship of psychological factors and sleep quality with the severity of carpal tunnel syndrome
No full textCarpal tunnel syndrome (CTS), the most common entrapment neuropathy, is graded as mild, moderate and severe. We aimed to evaluate the relationship between CTS severity and depression, anxiety, sleep quality and daytime sleepiness. One hundred and forty-nine patients with a diagnosis of CTS were prospectively included in the study. There was a statistically significant difference between the painDETECT questionnaire, age, pain severity, Pittsburgh Sleep Quality Scale, Boston CTS Symptom Severity Scale and Functional Status Scale scores and the severity of CTS (p0.05). We found an increase in daytime sleepiness in the severe type of CTS, which particularly affects hand functions and causes a decrease in the quality of life
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